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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.58 by root, Mon Oct 23 18:48:08 2006 UTC vs.
Revision 1.139 by root, Tue Apr 21 20:12:56 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/time.h>
15	#include <sys/select.h>
16	#include <sys/types.h>	12	#include <sys/types.h>
17	#include <sys/stat.h>	13	#include <sys/stat.h>
18	#include <limits.h>	14	#include <limits.h>
19	#include <unistd.h>
20	#include <fcntl.h>	15	#include <fcntl.h>
21	#include <signal.h>
22	#include <sched.h>	16	#include <sched.h>
23		17
24	#if HAVE_SENDFILE	18	/* perl namespace pollution */
25	# if __linux	19	#undef VERSION
26	# include <sys/sendfile.h>	20
27	# elif __freebsd	21	#ifdef _WIN32
28	# include <sys/socket.h>	22
29	# include <sys/uio.h>	23	# define EIO_STRUCT_DIRENT Direntry_t
30	# elif __hpux	24	# undef malloc
31	# include <sys/socket.h>	25	# undef free
32	# elif __solaris /* not yet */	26
33	# 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
34	# else	59	#else
35	# error sendfile support requested but not available	60
36	# 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
37	#endif	68	#endif
38		69
39	/* used for struct dirent, AIX doesn't provide it */	70	/* perl stupidly overrides readdir and maybe others */
40	#ifndef NAME_MAX	71	/* with thread-unsafe versions, imagine that :( */
41	# 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 SvVAL64 SvIV
		81	#else
		82	# define SvVAL64 SvNV
42	#endif	83	#endif
43		84
44	#if __ia64	85	/*****************************************************************************/
45	# define STACKSIZE 65536	86
		87	#if __GNUC__ >= 3
		88	# define expect(expr,value) __builtin_expect ((expr),(value))
46	#else	89	#else
47	# define STACKSIZE 8192	90	# define expect(expr,value) (expr)
48	#endif	91	#endif
49		92
50	enum {	93	#define expect_false(expr) expect ((expr) != 0, 0)
51	REQ_QUIT,	94	#define expect_true(expr) expect ((expr) != 0, 1)
52	REQ_OPEN, REQ_CLOSE,	95
53	REQ_READ, REQ_WRITE, REQ_READAHEAD,	96	/*****************************************************************************/
54	REQ_SENDFILE,	97
55	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	98	static HV *stash;
56	REQ_FSYNC, REQ_FDATASYNC,	99	typedef SV SV8; /* byte-sv, used for argument-checking */
57	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
58	REQ_READDIR,
59	REQ_LINK, REQ_SYMLINK,
60	REQ_GROUP, REQ_NOP,
61	REQ_SLEEP,
62	};
63		100
64	#define AIO_REQ_KLASS "IO::AIO::REQ"	101	#define AIO_REQ_KLASS "IO::AIO::REQ"
65	#define AIO_GRP_KLASS "IO::AIO::GRP"	102	#define AIO_GRP_KLASS "IO::AIO::GRP"
66		103
67	typedef struct aio_cb	104	#define EIO_REQ_MEMBERS \
68	{
69	struct aio_cb *volatile next;
70
71	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
72
73	SV *self; /* the perl counterpart of this request, if any */
74
75	SV *data, *callback;	105	SV *callback; \
76	SV *fh, *fh2;	106	SV *sv1, *sv2; \
77	void *dataptr, *data2ptr;
78	Stat_t *statdata;
79	off_t offset;
80	size_t length;
81	ssize_t result;
82
83	int type;
84	int fd, fd2;
85	int errorno;
86	STRLEN dataoffset;	107	STRLEN stroffset; \
87	mode_t mode; /* open */	108	SV *self;
88	unsigned char pri;	109
89	unsigned char flags;	110	#define EIO_NO_WRAPPERS 1
90	} aio_cb;	111
		112	#include "libeio/eio.h"
		113
		114	static int req_invoke (eio_req *req);
		115	#define EIO_FINISH(req) req_invoke (req)
		116	static void req_destroy (eio_req *grp);
		117	#define EIO_DESTROY(req) req_destroy (req)
91		118
92	enum {	119	enum {
93	FLAG_CANCELLED = 0x01,	120	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
94	};	121	};
95		122
		123	#include "libeio/eio.c"
		124
96	typedef aio_cb *aio_req;	125	typedef eio_req *aio_req;
97	typedef aio_cb *aio_req_ornot;	126	typedef eio_req *aio_req_ornot;
98		127
99	static int started, wanted;	128	static SV *on_next_submit;
100	static volatile int nreqs;	129	static int next_pri = EIO_PRI_DEFAULT;
101	static int max_outstanding = 1<<30;	130	static int max_outstanding;
102	static int respipe [2];
103		131
104	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	132	static int respipe_osf [2], respipe [2] = { -1, -1 };
105	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
106	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
107		133
108	static volatile aio_req reqs, reqe; /* queue start, queue end */	134	static void req_destroy (aio_req req);
109	static volatile aio_req ress, rese; /* queue start, queue end */
110
111	static void req_invoke (aio_req req);	135	static void req_cancel (aio_req req);
112	static void req_free (aio_req req);	136
		137	static void want_poll (void)
		138	{
		139	/* write a dummy byte to the pipe so fh becomes ready */
		140	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
		141	}
		142
		143	static void done_poll (void)
		144	{
		145	/* read any signals sent by the worker threads */
		146	char buf [4];
		147	while (respipe_read (respipe [0], buf, 4) == 4)
		148	;
		149	}
113		150
114	/* must be called at most once */	151	/* must be called at most once */
115	static SV *req_sv (aio_req req, const char *klass)	152	static SV *req_sv (aio_req req, const char *klass)
116	{	153	{
117	if (!req->self)	154	if (!req->self)
…		…
135	return mg ? (aio_req)mg->mg_ptr : 0;	172	return mg ? (aio_req)mg->mg_ptr : 0;
136	}	173	}
137		174
138	static void aio_grp_feed (aio_req grp)	175	static void aio_grp_feed (aio_req grp)
139	{	176	{
140	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	177	if (grp->sv2 && SvOK (grp->sv2))
141	{	178	{
142	int old_len = grp->length;	179	dSP;
143		180
144	if (grp->fh2 && SvOK (grp->fh2))	181	ENTER;
		182	SAVETMPS;
		183	PUSHMARK (SP);
		184	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		185	PUTBACK;
		186	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		187	SPAGAIN;
		188	FREETMPS;
		189	LEAVE;
		190	}
		191	}
		192
		193	static void req_submit (eio_req *req)
		194	{
		195	eio_submit (req);
		196
		197	if (expect_false (on_next_submit))
		198	{
		199	dSP;
		200	SV *cb = sv_2mortal (on_next_submit);
		201
		202	on_next_submit = 0;
		203
		204	PUSHMARK (SP);
		205	PUTBACK;
		206	call_sv (cb, G_DISCARD | G_EVAL);
		207	}
		208	}
		209
		210	static int req_invoke (eio_req *req)
		211	{
		212	dSP;
		213
		214	if (req->flags & FLAG_SV2_RO_OFF)
		215	SvREADONLY_off (req->sv2);
		216
		217	if (!EIO_CANCELLED (req) && req->callback)
		218	{
		219	ENTER;
		220	SAVETMPS;
		221	PUSHMARK (SP);
		222	EXTEND (SP, 1);
		223
		224	switch (req->type)
145	{	225	{
146	dSP;	226	case EIO_READDIR:
		227	{
		228	SV *rv = &PL_sv_undef;
147		229
148	ENTER;	230	if (req->result >= 0)
149	SAVETMPS;	231	{
150	PUSHMARK (SP);	232	int i;
151	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	233	char *buf = req->ptr2;
152	PUTBACK;	234	AV *av = newAV ();
153	call_sv (grp->fh2, G_VOID | G_EVAL);	235
154	SPAGAIN;	236	av_extend (av, req->result - 1);
155	FREETMPS;	237
156	LEAVE;	238	for (i = 0; i < req->result; ++i)
		239	{
		240	SV *sv = newSVpv (buf, 0);
		241
		242	av_store (av, i, sv);
		243	buf += SvCUR (sv) + 1;
		244	}
		245
		246	rv = sv_2mortal (newRV_noinc ((SV *)av));
		247	}
		248
		249	PUSHs (rv);
		250	}
		251	break;
		252
		253	case EIO_OPEN:
		254	{
		255	/* convert fd to fh */
		256	SV *fh = &PL_sv_undef;
		257
		258	if (req->result >= 0)
		259	{
		260	GV *gv = (GV *)sv_newmortal ();
		261	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		262	char sym [64];
		263	int symlen;
		264
		265	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
		266	gv_init (gv, stash, sym, symlen, 0);
		267
		268	symlen = snprintf (
		269	sym,
		270	sizeof (sym),
		271	"%s&=%d",
		272	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		273	req->result
		274	);
		275
		276	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		277	fh = (SV *)gv;
		278	}
		279
		280	PUSHs (fh);
		281	}
		282	break;
		283
		284	case EIO_GROUP:
		285	req->int1 = 2; /* mark group as finished */
		286
		287	if (req->sv1)
		288	{
		289	int i;
		290	AV *av = (AV *)req->sv1;
		291
		292	EXTEND (SP, AvFILL (av) + 1);
		293	for (i = 0; i <= AvFILL (av); ++i)
		294	PUSHs (*av_fetch (av, i, 0));
		295	}
		296	break;
		297
		298	case EIO_NOP:
		299	case EIO_BUSY:
		300	break;
		301
		302	case EIO_READLINK:
		303	if (req->result > 0)
		304	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		305	break;
		306
		307	case EIO_STAT:
		308	case EIO_LSTAT:
		309	case EIO_FSTAT:
		310	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		311	PL_laststatval = req->result;
		312	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		313	PUSHs (sv_2mortal (newSViv (req->result)));
		314	break;
		315
		316	case EIO_READ:
		317	{
		318	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		319	*SvEND (req->sv2) = 0;
		320	SvPOK_only (req->sv2);
		321	SvSETMAGIC (req->sv2);
		322	PUSHs (sv_2mortal (newSViv (req->result)));
		323	}
		324	break;
		325
		326	case EIO_DUP2:
		327	if (req->result > 0)
		328	req->result = 0;
		329	/* FALLTHROUGH */
		330
		331	default:
		332	PUSHs (sv_2mortal (newSViv (req->result)));
		333	break;
157	}	334	}
158		335
159	/* stop if no progress has been made */	336	errno = req->errorno;
160	if (old_len == grp->length)	337
161	{	338	PUTBACK;
162	SvREFCNT_dec (grp->fh2);	339	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
163	grp->fh2 = 0;	340	SPAGAIN;
164	break;	341
165	}	342	FREETMPS;
		343	LEAVE;
		344
		345	PUTBACK;
166	}	346	}
167	}
168		347
169	static void aio_grp_dec (aio_req grp)	348	return !!SvTRUE (ERRSV);
170	{
171	--grp->length;
172
173	/* call feeder, if applicable */
174	aio_grp_feed (grp);
175
176	/* finish, if done */
177	if (!grp->length && grp->fd)
178	{
179	req_invoke (grp);
180	req_free (grp);
181	}
182	}	349	}
183		350
184	static void poll_wait ()
185	{
186	if (nreqs && !ress)
187	{
188	fd_set rfd;
189	FD_ZERO(&rfd);
190	FD_SET(respipe [0], &rfd);
191
192	select (respipe [0] + 1, &rfd, 0, 0, 0);
193	}
194	}
195
196	static void req_invoke (aio_req req)
197	{
198	dSP;
199	int errorno = errno;
200
201	if (req->flags & FLAG_CANCELLED || !SvOK (req->callback))
202	return;
203
204	errno = req->errorno;
205
206	ENTER;
207	SAVETMPS;
208	PUSHMARK (SP);
209	EXTEND (SP, 1);
210
211	switch (req->type)
212	{
213	case REQ_READDIR:
214	{
215	SV *rv = &PL_sv_undef;
216
217	if (req->result >= 0)
218	{
219	char *buf = req->data2ptr;
220	AV *av = newAV ();
221
222	while (req->result)
223	{
224	SV *sv = newSVpv (buf, 0);
225
226	av_push (av, sv);
227	buf += SvCUR (sv) + 1;
228	req->result--;
229	}
230
231	rv = sv_2mortal (newRV_noinc ((SV *)av));
232	}
233
234	PUSHs (rv);
235	}
236	break;
237
238	case REQ_OPEN:
239	{
240	/* convert fd to fh */
241	SV *fh;
242
243	PUSHs (sv_2mortal (newSViv (req->result)));
244	PUTBACK;
245	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
246	SPAGAIN;
247
248	fh = SvREFCNT_inc (POPs);
249
250	PUSHMARK (SP);
251	XPUSHs (sv_2mortal (fh));
252	}
253	break;
254
255	case REQ_GROUP:
256	req->fd = 2; /* mark group as finished */
257
258	if (req->data)
259	{
260	int i;
261	AV *av = (AV *)req->data;
262
263	EXTEND (SP, AvFILL (av) + 1);
264	for (i = 0; i <= AvFILL (av); ++i)
265	PUSHs (*av_fetch (av, i, 0));
266	}
267	break;
268
269	case REQ_NOP:
270	case REQ_SLEEP:
271	break;
272
273	default:
274	PUSHs (sv_2mortal (newSViv (req->result)));
275	break;
276	}
277
278
279	PUTBACK;
280	call_sv (req->callback, G_VOID | G_EVAL);
281	SPAGAIN;
282
283	FREETMPS;
284	LEAVE;
285
286	errno = errorno;
287
288	if (SvTRUE (ERRSV))
289	{
290	req_free (req);
291	croak (0);
292	}
293	}
294
295	static void req_free (aio_req req)	351	static void req_destroy (aio_req req)
296	{	352	{
297	if (req->grp)
298	{
299	aio_req grp = req->grp;
300
301	/* unlink request */
302	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
303	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
304
305	if (grp->grp_first == req)
306	grp->grp_first = req->grp_next;
307
308	aio_grp_dec (grp);
309	}
310
311	if (req->self)	353	if (req->self)
312	{	354	{
313	sv_unmagic (req->self, PERL_MAGIC_ext);	355	sv_unmagic (req->self, PERL_MAGIC_ext);
314	SvREFCNT_dec (req->self);	356	SvREFCNT_dec (req->self);
315	}	357	}
316		358
317	SvREFCNT_dec (req->data);
318	SvREFCNT_dec (req->fh);	359	SvREFCNT_dec (req->sv1);
319	SvREFCNT_dec (req->fh2);	360	SvREFCNT_dec (req->sv2);
320	SvREFCNT_dec (req->callback);	361	SvREFCNT_dec (req->callback);
321	Safefree (req->statdata);
322
323	if (req->type == REQ_READDIR && req->result >= 0)
324	free (req->data2ptr);
325		362
326	Safefree (req);	363	Safefree (req);
327	}	364	}
328		365
329	static void req_cancel (aio_req req)	366	static void req_cancel_subs (aio_req grp)
330	{	367	{
331	req->flags |= FLAG_CANCELLED;	368	aio_req sub;
332		369
333	if (req->type == REQ_GROUP)	370	if (grp->type != EIO_GROUP)
		371	return;
		372
		373	SvREFCNT_dec (grp->sv2);
		374	grp->sv2 = 0;
		375
		376	eio_grp_cancel (grp);
		377	}
		378
		379	#ifdef USE_SOCKETS_AS_HANDLES
		380	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		381	#else
		382	# define TO_SOCKET(x) (x)
		383	#endif
		384
		385	static void
		386	create_respipe (void)
		387	{
		388	int old_readfd = respipe [0];
		389
		390	if (respipe [1] >= 0)
		391	respipe_close (TO_SOCKET (respipe [1]));
		392
		393	#ifdef _WIN32
		394	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		395	#else
		396	if (pipe (respipe))
		397	#endif
		398	croak ("unable to initialize result pipe");
		399
		400	if (old_readfd >= 0)
334	{	401	{
335	aio_req sub;	402	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
		403	croak ("unable to initialize result pipe(2)");
336		404
337	for (sub = req->grp_first; sub; sub = sub->grp_next)	405	respipe_close (respipe [0]);
338	req_cancel (sub);	406	respipe [0] = old_readfd;
339	}	407	}
340	}
341		408
		409	#ifdef _WIN32
		410	int arg = 1;
		411	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
		412	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
		413	#else
		414	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		415	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		416	#endif
		417	croak ("unable to initialize result pipe(3)");
		418
		419	respipe_osf [0] = TO_SOCKET (respipe [0]);
		420	respipe_osf [1] = TO_SOCKET (respipe [1]);
		421	}
		422
		423	static void poll_wait (void)
		424	{
		425	fd_set rfd;
		426
		427	while (eio_nreqs ())
		428	{
		429	int size;
		430
		431	X_LOCK (reslock);
		432	size = res_queue.size;
		433	X_UNLOCK (reslock);
		434
		435	if (size)
		436	return;
		437
		438	etp_maybe_start_thread ();
		439
		440	FD_ZERO (&rfd);
		441	FD_SET (respipe [0], &rfd);
		442
		443	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
		444	}
		445	}
		446
342	static int poll_cb ()	447	static int poll_cb (void)
343	{	448	{
344	dSP;
345	int count = 0;
346	int do_croak = 0;
347	aio_req req;
348
349	for (;;)	449	for (;;)
350	{	450	{
351	pthread_mutex_lock (&reslock);	451	int res = eio_poll ();
352	req = ress;
353		452
354	if (req)	453	if (res > 0)
355	{
356	ress = req->next;
357
358	if (!ress)
359	{
360	/* read any signals sent by the worker threads */
361	char buf [32];
362	while (read (respipe [0], buf, 32) == 32)
363	;
364
365	rese = 0;
366	}
367	}
368
369	pthread_mutex_unlock (&reslock);
370
371	if (!req)
372	break;	454	croak (0);
373		455
374	--nreqs;	456	if (!max_outstanding || max_outstanding > eio_nreqs ())
		457	return res;
375		458
376	if (req->type == REQ_QUIT)	459	poll_wait ();
377	started--;
378	else if (req->type == REQ_GROUP && req->length)
379	{
380	req->fd = 1; /* mark request as delayed */
381	continue;
382	}
383	else
384	{
385	if (req->type == REQ_READ)
386	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
387
388	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
389	SvREADONLY_off (req->data);
390
391	if (req->statdata)
392	{
393	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
394	PL_laststatval = req->result;
395	PL_statcache = *(req->statdata);
396	}
397
398	req_invoke (req);
399
400	count++;
401	}
402
403	req_free (req);
404	}	460	}
405
406	return count;
407	}	461	}
408		462
409	static void *aio_proc(void *arg);
410
411	static void start_thread (void)	463	static void atfork_child (void)
412	{	464	{
413	sigset_t fullsigset, oldsigset;	465	create_respipe ();
414	pthread_t tid;
415	pthread_attr_t attr;
416
417	pthread_attr_init (&attr);
418	pthread_attr_setstacksize (&attr, STACKSIZE);
419	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
420
421	sigfillset (&fullsigset);
422	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
423
424	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
425	started++;
426
427	sigprocmask (SIG_SETMASK, &oldsigset, 0);
428	}	466	}
429		467
430	static void req_send (aio_req req)	468	static SV *
		469	get_cb (SV *cb_sv)
431	{	470	{
432	while (started < wanted && nreqs >= started)	471	HV *st;
433	start_thread ();	472	GV *gvp;
		473	CV *cv;
434		474
435	++nreqs;	475	if (!SvOK (cb_sv))
436
437	pthread_mutex_lock (&reqlock);
438
439	req->next = 0;
440
441	if (reqe)
442	{
443	reqe->next = req;
444	reqe = req;
445	}
446	else
447	reqe = reqs = req;
448
449	pthread_cond_signal (&reqwait);
450	pthread_mutex_unlock (&reqlock);
451
452	if (nreqs > max_outstanding)
453	for (;;)
454	{
455	poll_cb ();
456
457	if (nreqs <= max_outstanding)
458	break;
459
460	poll_wait ();
461	}
462	}
463
464	static void end_thread (void)
465	{
466	aio_req req;
467	Newz (0, req, 1, aio_cb);
468	req->type = REQ_QUIT;
469
470	req_send (req);
471	}
472
473	static void min_parallel (int nthreads)
474	{
475	if (wanted < nthreads)
476	wanted = nthreads;
477	}
478
479	static void max_parallel (int nthreads)
480	{
481	int cur = started;
482
483	if (wanted > nthreads)
484	wanted = nthreads;
485
486	while (cur > wanted)
487	{
488	end_thread ();
489	cur--;
490	}
491
492	while (started > wanted)
493	{
494	poll_wait ();
495	poll_cb ();
496	}
497	}
498
499	static void create_pipe ()
500	{
501	if (pipe (respipe))
502	croak ("unable to initialize result pipe");
503
504	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
505	croak ("cannot set result pipe to nonblocking mode");
506
507	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
508	croak ("cannot set result pipe to nonblocking mode");
509	}
510
511	/*****************************************************************************/
512	/* work around various missing functions */
513
514	#if !HAVE_PREADWRITE
515	# define pread aio_pread
516	# define pwrite aio_pwrite
517
518	/*
519	* make our pread/pwrite safe against themselves, but not against
520	* normal read/write by using a mutex. slows down execution a lot,
521	* but that's your problem, not mine.
522	*/
523	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
524
525	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
526	{
527	ssize_t res;
528	off_t ooffset;
529
530	pthread_mutex_lock (&preadwritelock);
531	ooffset = lseek (fd, 0, SEEK_CUR);
532	lseek (fd, offset, SEEK_SET);
533	res = read (fd, buf, count);
534	lseek (fd, ooffset, SEEK_SET);
535	pthread_mutex_unlock (&preadwritelock);
536
537	return res;
538	}
539
540	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
541	{
542	ssize_t res;
543	off_t ooffset;
544
545	pthread_mutex_lock (&preadwritelock);
546	ooffset = lseek (fd, 0, SEEK_CUR);
547	lseek (fd, offset, SEEK_SET);
548	res = write (fd, buf, count);
549	lseek (fd, offset, SEEK_SET);
550	pthread_mutex_unlock (&preadwritelock);
551
552	return res;
553	}
554	#endif
555
556	#if !HAVE_FDATASYNC
557	# define fdatasync fsync
558	#endif
559
560	#if !HAVE_READAHEAD
561	# define readahead aio_readahead
562
563	static ssize_t readahead (int fd, off_t offset, size_t count)
564	{
565	char readahead_buf[4096];
566
567	while (count > 0)
568	{
569	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
570
571	pread (fd, readahead_buf, len, offset);
572	offset += len;
573	count -= len;
574	}
575
576	errno = 0;
577	}
578	#endif
579
580	#if !HAVE_READDIR_R
581	# define readdir_r aio_readdir_r
582
583	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
584
585	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
586	{
587	struct dirent *e;
588	int errorno;
589
590	pthread_mutex_lock (&readdirlock);
591
592	e = readdir (dirp);
593	errorno = errno;
594
595	if (e)
596	{
597	*res = ent;
598	strcpy (ent->d_name, e->d_name);
599	}
600	else
601	*res = 0;
602
603	pthread_mutex_unlock (&readdirlock);
604
605	errno = errorno;
606	return e ? 0 : -1;
607	}
608	#endif
609
610	/* sendfile always needs emulation */
611	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
612	{
613	ssize_t res;
614
615	if (!count)
616	return 0;	476	return 0;
617		477
618	#if HAVE_SENDFILE	478	cv = sv_2cv (cb_sv, &st, &gvp, 0);
619	# if __linux
620	res = sendfile (ofd, ifd, &offset, count);
621		479
622	# elif __freebsd	480	if (!cv)
623	/*	481	croak ("IO::AIO callback must be undef or a CODE reference");
624	* Of course, the freebsd sendfile is a dire hack with no thoughts
625	* wasted on making it similar to other I/O functions.
626	*/
627	{
628	off_t sbytes;
629	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
630		482
631	if (res < 0 && sbytes)	483	return (SV *)cv;
632	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
633	res = sbytes;
634	}
635
636	# elif __hpux
637	res = sendfile (ofd, ifd, offset, count, 0, 0);
638
639	# elif __solaris
640	{
641	struct sendfilevec vec;
642	size_t sbytes;
643
644	vec.sfv_fd = ifd;
645	vec.sfv_flag = 0;
646	vec.sfv_off = offset;
647	vec.sfv_len = count;
648
649	res = sendfilev (ofd, &vec, 1, &sbytes);
650
651	if (res < 0 && sbytes)
652	res = sbytes;
653	}
654
655	# endif
656	#else
657	res = -1;
658	errno = ENOSYS;
659	#endif
660
661	if (res < 0
662	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
663	#if __solaris
664	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
665	#endif
666	)
667	)
668	{
669	/* emulate sendfile. this is a major pain in the ass */
670	char buf[4096];
671	res = 0;
672
673	while (count)
674	{
675	ssize_t cnt;
676
677	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
678
679	if (cnt <= 0)
680	{
681	if (cnt && !res) res = -1;
682	break;
683	}
684
685	cnt = write (ofd, buf, cnt);
686
687	if (cnt <= 0)
688	{
689	if (cnt && !res) res = -1;
690	break;
691	}
692
693	offset += cnt;
694	res += cnt;
695	count -= cnt;
696	}
697	}
698
699	return res;
700	}
701
702	/* read a full directory */
703	static int scandir_ (const char *path, void **namesp)
704	{
705	DIR *dirp = opendir (path);
706	union
707	{
708	struct dirent d;
709	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
710	} u;
711	struct dirent *entp;
712	char *name, *names;
713	int memlen = 4096;
714	int memofs = 0;
715	int res = 0;
716	int errorno;
717
718	if (!dirp)
719	return -1;
720
721	names = malloc (memlen);
722
723	for (;;)
724	{
725	errno = 0, readdir_r (dirp, &u.d, &entp);
726
727	if (!entp)
728	break;
729
730	name = entp->d_name;
731
732	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
733	{
734	int len = strlen (name) + 1;
735
736	res++;
737
738	while (memofs + len > memlen)
739	{
740	memlen *= 2;
741	names = realloc (names, memlen);
742	if (!names)
743	break;
744	}
745
746	memcpy (names + memofs, name, len);
747	memofs += len;
748	}
749	}
750
751	errorno = errno;
752	closedir (dirp);
753
754	if (errorno)
755	{
756	free (names);
757	errno = errorno;
758	res = -1;
759	}
760
761	*namesp = (void *)names;
762	return res;
763	}
764
765	/*****************************************************************************/
766
767	static void *aio_proc (void *thr_arg)
768	{
769	aio_req req;
770	int type;
771
772	do
773	{
774	pthread_mutex_lock (&reqlock);
775
776	for (;;)
777	{
778	req = reqs;
779
780	if (reqs)
781	{
782	reqs = reqs->next;
783	if (!reqs) reqe = 0;
784	}
785
786	if (req)
787	break;
788
789	pthread_cond_wait (&reqwait, &reqlock);
790	}
791
792	pthread_mutex_unlock (&reqlock);
793
794	errno = 0; /* strictly unnecessary */
795
796	if (!(req->flags & FLAG_CANCELLED))
797	switch (type = req->type) /* remember type for QUIT check */
798	{
799	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
800	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
801
802	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
803	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
804
805	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
806	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
807	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
808
809	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
810	case REQ_CLOSE: req->result = close (req->fd); break;
811	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
812	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
813	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
814	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
815	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
816
817	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
818	case REQ_FSYNC: req->result = fsync (req->fd); break;
819	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
820
821	case REQ_SLEEP:
822	{
823	struct timeval tv;
824
825	tv.tv_sec = req->fd;
826	tv.tv_usec = req->fd2;
827
828	req->result = select (0, 0, 0, 0, &tv);
829	}
830
831	case REQ_GROUP:
832	case REQ_NOP:
833	case REQ_QUIT:
834	break;
835
836	default:
837	req->result = ENOSYS;
838	break;
839	}
840
841	req->errorno = errno;
842
843	pthread_mutex_lock (&reslock);
844
845	req->next = 0;
846
847	if (rese)
848	{
849	rese->next = req;
850	rese = req;
851	}
852	else
853	{
854	rese = ress = req;
855
856	/* write a dummy byte to the pipe so fh becomes ready */
857	write (respipe [1], &respipe, 1);
858	}
859
860	pthread_mutex_unlock (&reslock);
861	}
862	while (type != REQ_QUIT);
863
864	return 0;
865	}
866
867	/*****************************************************************************/
868
869	static void atfork_prepare (void)
870	{
871	pthread_mutex_lock (&reqlock);
872	pthread_mutex_lock (&reslock);
873	#if !HAVE_PREADWRITE
874	pthread_mutex_lock (&preadwritelock);
875	#endif
876	#if !HAVE_READDIR_R
877	pthread_mutex_lock (&readdirlock);
878	#endif
879	}
880
881	static void atfork_parent (void)
882	{
883	#if !HAVE_READDIR_R
884	pthread_mutex_unlock (&readdirlock);
885	#endif
886	#if !HAVE_PREADWRITE
887	pthread_mutex_unlock (&preadwritelock);
888	#endif
889	pthread_mutex_unlock (&reslock);
890	pthread_mutex_unlock (&reqlock);
891	}
892
893	static void atfork_child (void)
894	{
895	aio_req prv;
896
897	started = 0;
898
899	while (reqs)
900	{
901	prv = reqs;
902	reqs = prv->next;
903	req_free (prv);
904	}
905
906	reqs = reqe = 0;
907
908	while (ress)
909	{
910	prv = ress;
911	ress = prv->next;
912	req_free (prv);
913	}
914
915	ress = rese = 0;
916
917	close (respipe [0]);
918	close (respipe [1]);
919	create_pipe ();
920
921	atfork_parent ();
922	}	484	}
923		485
924	#define dREQ \	486	#define dREQ \
		487	SV *cb_cv; \
925	aio_req req; \	488	aio_req req; \
		489	int req_pri = next_pri; \
		490	next_pri = EIO_PRI_DEFAULT; \
926	\	491	\
927	if (SvOK (callback) && !SvROK (callback)) \	492	cb_cv = get_cb (callback); \
928	croak ("callback must be undef or of reference type"); \
929	\	493	\
930	Newz (0, req, 1, aio_cb); \	494	Newz (0, req, 1, eio_req); \
931	if (!req) \	495	if (!req) \
932	croak ("out of memory during aio_req allocation"); \	496	croak ("out of memory during eio_req allocation"); \
933	\	497	\
934	req->callback = newSVsv (callback)	498	req->callback = SvREFCNT_inc (cb_cv); \
		499	req->pri = req_pri
935		500
936	#define REQ_SEND \	501	#define REQ_SEND \
		502	PUTBACK; \
937	req_send (req); \	503	req_submit (req); \
		504	SPAGAIN; \
938	\	505	\
939	if (GIMME_V != G_VOID) \	506	if (GIMME_V != G_VOID) \
940	XPUSHs (req_sv (req, AIO_REQ_KLASS));	507	XPUSHs (req_sv (req, AIO_REQ_KLASS));
941		508
		509	static int
		510	extract_fd (SV *fh, int wr)
		511	{
		512	int fd = PerlIO_fileno (wr ? IoOFP (sv_2io (fh)) : IoIFP (sv_2io (fh)));
		513
		514	if (fd < 0)
		515	croak ("illegal fh argument, either not an OS file or read/write mode mismatch");
		516
		517	return fd;
		518	}
		519
942	MODULE = IO::AIO PACKAGE = IO::AIO	520	MODULE = IO::AIO PACKAGE = IO::AIO
943		521
944	PROTOTYPES: ENABLE	522	PROTOTYPES: ENABLE
945		523
946	BOOT:	524	BOOT:
947	{	525	{
948	HV *stash = gv_stashpv ("IO::AIO", 1);	526	stash = gv_stashpv ("IO::AIO", 1);
		527
949	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	528	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
950	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	529	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
951	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	530	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		531	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		532	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		533	#ifndef _WIN32
		534	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		535	#endif
		536	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		537	newCONSTSUB (stash, "SYNC_FILE_RANGE_WAIT_BEFORE", newSViv (EIO_SYNC_FILE_RANGE_WAIT_BEFORE));
		538	newCONSTSUB (stash, "SYNC_FILE_RANGE_WRITE" , newSViv (EIO_SYNC_FILE_RANGE_WRITE));
		539	newCONSTSUB (stash, "SYNC_FILE_RANGE_WAIT_AFTER" , newSViv (EIO_SYNC_FILE_RANGE_WAIT_AFTER));
952		540
953	create_pipe ();	541	create_respipe ();
954	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
955	}
956		542
		543	if (eio_init (want_poll, done_poll) < 0)
		544	croak ("IO::AIO: unable to initialise eio library");
		545
		546	/* atfork child called in fifo order, so before eio's handler */
		547	X_THREAD_ATFORK (0, 0, atfork_child);
		548	}
		549
957	void	550	void
958	min_parallel (nthreads)	551	max_poll_reqs (int nreqs)
959	int nthreads
960	PROTOTYPE: $	552	PROTOTYPE: $
		553	CODE:
		554	eio_set_max_poll_reqs (nreqs);
961		555
962	void	556	void
963	max_parallel (nthreads)	557	max_poll_time (double nseconds)
964	int nthreads
965	PROTOTYPE: $	558	PROTOTYPE: $
966
967	int
968	max_outstanding (nreqs)
969	int nreqs
970	PROTOTYPE: $
971	CODE:	559	CODE:
972	RETVAL = max_outstanding;	560	eio_set_max_poll_time (nseconds);
		561
		562	void
		563	min_parallel (int nthreads)
		564	PROTOTYPE: $
		565	CODE:
		566	eio_set_min_parallel (nthreads);
		567
		568	void
		569	max_parallel (int nthreads)
		570	PROTOTYPE: $
		571	CODE:
		572	eio_set_max_parallel (nthreads);
		573
		574	void
		575	max_idle (int nthreads)
		576	PROTOTYPE: $
		577	CODE:
		578	eio_set_max_idle (nthreads);
		579
		580	void
		581	max_outstanding (int maxreqs)
		582	PROTOTYPE: $
		583	CODE:
973	max_outstanding = nreqs;	584	max_outstanding = maxreqs;
974		585
975	void	586	void
976	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	587	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
977	SV * pathname
978	int flags
979	int mode
980	SV * callback
981	PROTOTYPE: $$$;$	588	PROTOTYPE: $$$;$
982	PPCODE:	589	PPCODE:
983	{	590	{
984	dREQ;	591	dREQ;
985		592
986	req->type = REQ_OPEN;	593	req->type = EIO_OPEN;
987	req->data = newSVsv (pathname);	594	req->sv1 = newSVsv (pathname);
988	req->dataptr = SvPVbyte_nolen (req->data);	595	req->ptr1 = SvPVbyte_nolen (req->sv1);
989	req->fd = flags;	596	req->int1 = flags;
990	req->mode = mode;	597	req->int2 = mode;
991		598
992	REQ_SEND;	599	REQ_SEND;
993	}	600	}
994		601
995	void	602	void
996	aio_close (fh,callback=&PL_sv_undef)	603	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
997	SV * fh
998	SV * callback
999	PROTOTYPE: $;$	604	PROTOTYPE: $;$
1000	ALIAS:	605	ALIAS:
1001	aio_close = REQ_CLOSE
1002	aio_fsync = REQ_FSYNC	606	aio_fsync = EIO_FSYNC
1003	aio_fdatasync = REQ_FDATASYNC	607	aio_fdatasync = EIO_FDATASYNC
1004	PPCODE:	608	PPCODE:
1005	{	609	{
		610	int fd = extract_fd (fh, 0);
1006	dREQ;	611	dREQ;
1007		612
1008	req->type = ix;	613	req->type = ix;
1009	req->fh = newSVsv (fh);	614	req->sv1 = newSVsv (fh);
1010	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	615	req->int1 = fd;
1011		616
1012	REQ_SEND (req);	617	REQ_SEND (req);
1013	}	618	}
1014		619
1015	void	620	void
		621	aio_sync_file_range (SV *fh, SV *offset, SV *nbytes, IV flags, SV *callback=&PL_sv_undef)
		622	PROTOTYPE: $$$$;$
		623	PPCODE:
		624	{
		625	int fd = extract_fd (fh, 0);
		626	dREQ;
		627
		628	req->type = EIO_SYNC_FILE_RANGE;
		629	req->sv1 = newSVsv (fh);
		630	req->int1 = fd;
		631	req->offs = SvVAL64 (offset);
		632	req->size = SvVAL64 (nbytes);
		633	req->int2 = flags;
		634
		635	REQ_SEND (req);
		636	}
		637
		638	void
		639	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		640	PROTOTYPE: $;$
		641	PPCODE:
		642	{
		643	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		644	int fd = extract_fd (fh, 0);
		645	dREQ;
		646
		647	if (close_pipe < 0)
		648	{
		649	int pipefd [2];
		650
		651	if (pipe (pipefd) < 0
		652	|| close (pipefd [1]) < 0
		653	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		654	abort (); /*D*/
		655
		656	close_pipe = pipefd [0];
		657	}
		658
		659	req->type = EIO_DUP2;
		660	req->int1 = close_pipe;
		661	req->sv2 = newSVsv (fh);
		662	req->int2 = fd;
		663
		664	REQ_SEND (req);
		665	}
		666
		667	void
1016	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	668	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1017	SV * fh
1018	UV offset
1019	UV length
1020	SV * data
1021	UV dataoffset
1022	SV * callback
1023	ALIAS:	669	ALIAS:
1024	aio_read = REQ_READ	670	aio_read = EIO_READ
1025	aio_write = REQ_WRITE	671	aio_write = EIO_WRITE
1026	PROTOTYPE: $$$$$;$	672	PROTOTYPE: $$$$$;$
1027	PPCODE:	673	PPCODE:
1028	{	674	{
1029	aio_req req;
1030	STRLEN svlen;	675	STRLEN svlen;
		676	int fd = extract_fd (fh, ix == EIO_WRITE);
1031	char *svptr = SvPVbyte (data, svlen);	677	char *svptr = SvPVbyte (data, svlen);
1032		678	UV len = SvUV (length);
1033	SvUPGRADE (data, SVt_PV);
1034	SvPOK_on (data);
1035		679
1036	if (dataoffset < 0)	680	if (dataoffset < 0)
1037	dataoffset += svlen;	681	dataoffset += svlen;
1038		682
1039	if (dataoffset < 0 || dataoffset > svlen)	683	if (dataoffset < 0 || dataoffset > svlen)
1040	croak ("data offset outside of string");	684	croak ("dataoffset outside of data scalar");
1041		685
1042	if (ix == REQ_WRITE)	686	if (ix == EIO_WRITE)
1043	{	687	{
1044	/* write: check length and adjust. */	688	/* write: check length and adjust. */
1045	if (length < 0 || length + dataoffset > svlen)	689	if (!SvOK (length) || len + dataoffset > svlen)
1046	length = svlen - dataoffset;	690	len = svlen - dataoffset;
1047	}	691	}
1048	else	692	else
1049	{	693	{
1050	/* read: grow scalar as necessary */	694	/* read: check type and grow scalar as necessary */
		695	SvUPGRADE (data, SVt_PV);
1051	svptr = SvGROW (data, length + dataoffset);	696	svptr = SvGROW (data, len + dataoffset + 1);
1052	}	697	}
1053
1054	if (length < 0)
1055	croak ("length must not be negative");
1056		698
1057	{	699	{
1058	dREQ;	700	dREQ;
1059		701
1060	req->type = ix;	702	req->type = ix;
1061	req->fh = newSVsv (fh);	703	req->sv1 = newSVsv (fh);
1062	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	704	req->int1 = fd;
1063	: IoOFP (sv_2io (fh)));	705	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1064	req->offset = offset;	706	req->size = len;
1065	req->length = length;
1066	req->data = SvREFCNT_inc (data);	707	req->sv2 = SvREFCNT_inc (data);
1067	req->dataptr = (char *)svptr + dataoffset;	708	req->ptr2 = (char *)svptr + dataoffset;
		709	req->stroffset = dataoffset;
1068		710
1069	if (!SvREADONLY (data))	711	if (!SvREADONLY (data))
1070	{	712	{
1071	SvREADONLY_on (data);	713	SvREADONLY_on (data);
1072	req->data2ptr = (void *)data;	714	req->flags |= FLAG_SV2_RO_OFF;
1073	}	715	}
1074		716
1075	REQ_SEND;	717	REQ_SEND;
1076	}	718	}
1077	}	719	}
1078		720
1079	void	721	void
		722	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		723	PROTOTYPE: $$;$
		724	PPCODE:
		725	{
		726	SV *data;
		727	dREQ;
		728
		729	req->type = EIO_READLINK;
		730	req->sv1 = newSVsv (path);
		731	req->ptr1 = SvPVbyte_nolen (req->sv1);
		732
		733	REQ_SEND;
		734	}
		735
		736	void
1080	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	737	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
1081	SV * out_fh
1082	SV * in_fh
1083	UV in_offset
1084	UV length
1085	SV * callback
1086	PROTOTYPE: $$$$;$	738	PROTOTYPE: $$$$;$
1087	PPCODE:	739	PPCODE:
1088	{	740	{
		741	int ifd = extract_fd (in_fh , 0);
		742	int ofd = extract_fd (out_fh, 0);
1089	dREQ;	743	dREQ;
1090		744
1091	req->type = REQ_SENDFILE;	745	req->type = EIO_SENDFILE;
1092	req->fh = newSVsv (out_fh);	746	req->sv1 = newSVsv (out_fh);
1093	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	747	req->int1 = ofd;
1094	req->fh2 = newSVsv (in_fh);	748	req->sv2 = newSVsv (in_fh);
1095	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	749	req->int2 = ifd;
1096	req->offset = in_offset;	750	req->offs = SvVAL64 (in_offset);
1097	req->length = length;	751	req->size = length;
1098		752
1099	REQ_SEND;	753	REQ_SEND;
1100	}	754	}
1101		755
1102	void	756	void
1103	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	757	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1104	SV * fh
1105	UV offset
1106	IV length
1107	SV * callback
1108	PROTOTYPE: $$$;$	758	PROTOTYPE: $$$;$
1109	PPCODE:	759	PPCODE:
1110	{	760	{
		761	int fd = extract_fd (fh, 0);
1111	dREQ;	762	dREQ;
1112		763
1113	req->type = REQ_READAHEAD;	764	req->type = EIO_READAHEAD;
1114	req->fh = newSVsv (fh);	765	req->sv1 = newSVsv (fh);
1115	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	766	req->int1 = fd;
1116	req->offset = offset;	767	req->offs = SvVAL64 (offset);
1117	req->length = length;	768	req->size = length;
1118		769
1119	REQ_SEND;	770	REQ_SEND;
1120	}	771	}
1121		772
1122	void	773	void
1123	aio_stat (fh_or_path,callback=&PL_sv_undef)	774	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1124	SV * fh_or_path
1125	SV * callback
1126	ALIAS:	775	ALIAS:
1127	aio_stat = REQ_STAT	776	aio_stat = EIO_STAT
1128	aio_lstat = REQ_LSTAT	777	aio_lstat = EIO_LSTAT
1129	PPCODE:	778	PPCODE:
1130	{	779	{
1131	dREQ;	780	dREQ;
1132		781
1133	New (0, req->statdata, 1, Stat_t);	782	req->sv1 = newSVsv (fh_or_path);
1134	if (!req->statdata)
1135	{
1136	req_free (req);
1137	croak ("out of memory during aio_req->statdata allocation");
1138	}
1139		783
1140	if (SvPOK (fh_or_path))	784	if (SvPOK (req->sv1))
1141	{	785	{
1142	req->type = ix;	786	req->type = ix;
1143	req->data = newSVsv (fh_or_path);
1144	req->dataptr = SvPVbyte_nolen (req->data);	787	req->ptr1 = SvPVbyte_nolen (req->sv1);
1145	}	788	}
1146	else	789	else
1147	{	790	{
1148	req->type = REQ_FSTAT;	791	req->type = EIO_FSTAT;
1149	req->fh = newSVsv (fh_or_path);
1150	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	792	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1151	}	793	}
1152		794
1153	REQ_SEND;	795	REQ_SEND;
1154	}	796	}
1155		797
1156	void	798	void
		799	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		800	PPCODE:
		801	{
		802	dREQ;
		803
		804	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		805	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		806	req->sv1 = newSVsv (fh_or_path);
		807
		808	if (SvPOK (req->sv1))
		809	{
		810	req->type = EIO_UTIME;
		811	req->ptr1 = SvPVbyte_nolen (req->sv1);
		812	}
		813	else
		814	{
		815	req->type = EIO_FUTIME;
		816	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		817	}
		818
		819	REQ_SEND;
		820	}
		821
		822	void
		823	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		824	PPCODE:
		825	{
		826	dREQ;
		827
		828	req->sv1 = newSVsv (fh_or_path);
		829	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		830
		831	if (SvPOK (req->sv1))
		832	{
		833	req->type = EIO_TRUNCATE;
		834	req->ptr1 = SvPVbyte_nolen (req->sv1);
		835	}
		836	else
		837	{
		838	req->type = EIO_FTRUNCATE;
		839	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		840	}
		841
		842	REQ_SEND;
		843	}
		844
		845	void
		846	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		847	ALIAS:
		848	aio_chmod = EIO_CHMOD
		849	aio_mkdir = EIO_MKDIR
		850	PPCODE:
		851	{
		852	dREQ;
		853
		854	req->int2 = mode;
		855	req->sv1 = newSVsv (fh_or_path);
		856
		857	if (SvPOK (req->sv1))
		858	{
		859	req->type = ix;
		860	req->ptr1 = SvPVbyte_nolen (req->sv1);
		861	}
		862	else
		863	{
		864	req->type = EIO_FCHMOD;
		865	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		866	}
		867
		868	REQ_SEND;
		869	}
		870
		871	void
		872	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		873	PPCODE:
		874	{
		875	dREQ;
		876
		877	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		878	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		879	req->sv1 = newSVsv (fh_or_path);
		880
		881	if (SvPOK (req->sv1))
		882	{
		883	req->type = EIO_CHOWN;
		884	req->ptr1 = SvPVbyte_nolen (req->sv1);
		885	}
		886	else
		887	{
		888	req->type = EIO_FCHOWN;
		889	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		890	}
		891
		892	REQ_SEND;
		893	}
		894
		895	void
1157	aio_unlink (pathname,callback=&PL_sv_undef)	896	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1158	SV * pathname
1159	SV * callback
1160	ALIAS:	897	ALIAS:
1161	aio_unlink = REQ_UNLINK	898	aio_unlink = EIO_UNLINK
1162	aio_rmdir = REQ_RMDIR	899	aio_rmdir = EIO_RMDIR
1163	aio_readdir = REQ_READDIR	900	aio_readdir = EIO_READDIR
1164	PPCODE:	901	PPCODE:
1165	{	902	{
1166	dREQ;	903	dREQ;
1167		904
1168	req->type = ix;	905	req->type = ix;
1169	req->data = newSVsv (pathname);	906	req->sv1 = newSVsv (pathname);
1170	req->dataptr = SvPVbyte_nolen (req->data);	907	req->ptr1 = SvPVbyte_nolen (req->sv1);
		908
		909	REQ_SEND;
		910	}
		911
		912	void
		913	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		914	ALIAS:
		915	aio_link = EIO_LINK
		916	aio_symlink = EIO_SYMLINK
		917	aio_rename = EIO_RENAME
		918	PPCODE:
		919	{
		920	dREQ;
		921
		922	req->type = ix;
		923	req->sv1 = newSVsv (oldpath);
		924	req->ptr1 = SvPVbyte_nolen (req->sv1);
		925	req->sv2 = newSVsv (newpath);
		926	req->ptr2 = SvPVbyte_nolen (req->sv2);
1171		927
1172	REQ_SEND;	928	REQ_SEND;
1173	}	929	}
1174		930
1175	void	931	void
1176	aio_link (oldpath,newpath,callback=&PL_sv_undef)	932	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1177	SV * oldpath
1178	SV * newpath
1179	SV * callback
1180	ALIAS:
1181	aio_link = REQ_LINK
1182	aio_symlink = REQ_SYMLINK
1183	aio_rename = REQ_RENAME
1184	PPCODE:	933	PPCODE:
1185	{	934	{
1186	dREQ;	935	dREQ;
1187		936
1188	req->type = ix;	937	req->type = EIO_MKNOD;
1189	req->fh = newSVsv (oldpath);	938	req->sv1 = newSVsv (pathname);
1190	req->data2ptr = SvPVbyte_nolen (req->fh);	939	req->ptr1 = SvPVbyte_nolen (req->sv1);
1191	req->data = newSVsv (newpath);	940	req->int2 = (mode_t)mode;
1192	req->dataptr = SvPVbyte_nolen (req->data);	941	req->offs = dev;
1193		942
1194	REQ_SEND;	943	REQ_SEND;
1195	}	944	}
1196		945
1197	void	946	void
1198	aio_sleep (delay,callback=&PL_sv_undef)	947	aio_busy (double delay, SV *callback=&PL_sv_undef)
1199	double delay
1200	SV * callback
1201	PPCODE:	948	PPCODE:
1202	{	949	{
1203	dREQ;	950	dREQ;
1204		951
1205	req->type = REQ_SLEEP;	952	req->type = EIO_BUSY;
1206	req->fd = delay < 0. ? 0 : delay;	953	req->nv1 = delay < 0. ? 0. : delay;
1207	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1208		954
1209	REQ_SEND;	955	REQ_SEND;
1210	}	956	}
1211		957
1212	void	958	void
1213	aio_group (callback=&PL_sv_undef)	959	aio_group (SV *callback=&PL_sv_undef)
1214	SV * callback
1215	PROTOTYPE: ;$	960	PROTOTYPE: ;$
1216	PPCODE:	961	PPCODE:
1217	{	962	{
1218	dREQ;	963	dREQ;
		964
1219	req->type = REQ_GROUP;	965	req->type = EIO_GROUP;
		966
1220	req_send (req);	967	req_submit (req);
1221	XPUSHs (req_sv (req, AIO_GRP_KLASS));	968	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1222	}	969	}
1223		970
1224	void	971	void
1225	aio_nop (callback=&PL_sv_undef)	972	aio_nop (SV *callback=&PL_sv_undef)
1226	SV * callback	973	ALIAS:
		974	aio_nop = EIO_NOP
		975	aio_sync = EIO_SYNC
1227	PPCODE:	976	PPCODE:
1228	{	977	{
1229	dREQ;	978	dREQ;
1230		979
1231	req->type = REQ_NOP;	980	req->type = ix;
1232		981
1233	REQ_SEND;	982	REQ_SEND;
1234	}	983	}
		984
		985	int
		986	aioreq_pri (int pri = 0)
		987	PROTOTYPE: ;$
		988	CODE:
		989	RETVAL = next_pri;
		990	if (items > 0)
		991	{
		992	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		993	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		994	next_pri = pri;
		995	}
		996	OUTPUT:
		997	RETVAL
		998
		999	void
		1000	aioreq_nice (int nice = 0)
		1001	CODE:
		1002	nice = next_pri - nice;
		1003	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1004	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1005	next_pri = nice;
1235		1006
1236	void	1007	void
1237	flush ()	1008	flush ()
1238	PROTOTYPE:	1009	PROTOTYPE:
1239	CODE:	1010	CODE:
1240	while (nreqs)	1011	while (eio_nreqs ())
1241	{	1012	{
1242	poll_wait ();	1013	poll_wait ();
1243	poll_cb ();	1014	poll_cb ();
1244	}	1015	}
1245		1016
1246	void	1017	int
1247	poll()	1018	poll()
1248	PROTOTYPE:	1019	PROTOTYPE:
1249	CODE:	1020	CODE:
1250	if (nreqs)
1251	{
1252	poll_wait ();	1021	poll_wait ();
1253	poll_cb ();	1022	RETVAL = poll_cb ();
1254	}	1023	OUTPUT:
		1024	RETVAL
1255		1025
1256	int	1026	int
1257	poll_fileno()	1027	poll_fileno()
1258	PROTOTYPE:	1028	PROTOTYPE:
1259	CODE:	1029	CODE:
…		…
1271		1041
1272	void	1042	void
1273	poll_wait()	1043	poll_wait()
1274	PROTOTYPE:	1044	PROTOTYPE:
1275	CODE:	1045	CODE:
1276	if (nreqs)
1277	poll_wait ();	1046	poll_wait ();
1278		1047
1279	int	1048	int
1280	nreqs()	1049	nreqs()
1281	PROTOTYPE:	1050	PROTOTYPE:
1282	CODE:	1051	CODE:
1283	RETVAL = nreqs;	1052	RETVAL = eio_nreqs ();
1284	OUTPUT:	1053	OUTPUT:
1285	RETVAL	1054	RETVAL
1286		1055
		1056	int
		1057	nready()
		1058	PROTOTYPE:
		1059	CODE:
		1060	RETVAL = eio_nready ();
		1061	OUTPUT:
		1062	RETVAL
		1063
		1064	int
		1065	npending()
		1066	PROTOTYPE:
		1067	CODE:
		1068	RETVAL = eio_npending ();
		1069	OUTPUT:
		1070	RETVAL
		1071
		1072	int
		1073	nthreads()
		1074	PROTOTYPE:
		1075	CODE:
		1076	RETVAL = eio_nthreads ();
		1077	OUTPUT:
		1078	RETVAL
		1079
		1080	void _on_next_submit (SV *cb)
		1081	CODE:
		1082	SvREFCNT_dec (on_next_submit);
		1083	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1084
1287	PROTOTYPES: DISABLE	1085	PROTOTYPES: DISABLE
1288		1086
1289	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1087	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1290		1088
1291	void	1089	void
1292	cancel (aio_req_ornot req)	1090	cancel (aio_req_ornot req)
1293	PROTOTYPE:
1294	CODE:	1091	CODE:
1295	req_cancel (req);	1092	eio_cancel (req);
1296		1093
1297	void	1094	void
1298	cb (aio_req req, SV *callback=&PL_sv_undef)	1095	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1299	CODE:	1096	PPCODE:
		1097	{
		1098	if (GIMME_V != G_VOID)
		1099	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1100
		1101	if (items > 1)
		1102	{
		1103	SV *cb_cv = get_cb (callback);
		1104
1300	SvREFCNT_dec (req->callback);	1105	SvREFCNT_dec (req->callback);
1301	req->callback = newSVsv (callback);	1106	req->callback = SvREFCNT_inc (cb_cv);
		1107	}
		1108	}
1302		1109
1303	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1110	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1304		1111
1305	void	1112	void
1306	add (aio_req grp, ...)	1113	add (aio_req grp, ...)
1307	PPCODE:	1114	PPCODE:
1308	{	1115	{
1309	int i;	1116	int i;
1310	aio_req req;
1311		1117
1312	if (grp->fd == 2)	1118	if (grp->int1 == 2)
1313	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1119	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1314		1120
1315	for (i = 1; i < items; ++i )	1121	for (i = 1; i < items; ++i )
1316	{	1122	{
		1123	aio_req req;
		1124
1317	if (GIMME_V != G_VOID)	1125	if (GIMME_V != G_VOID)
1318	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1126	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1319		1127
1320	req = SvAIO_REQ (ST (i));	1128	req = SvAIO_REQ (ST (i));
1321		1129
1322	if (req)	1130	if (req)
1323	{	1131	eio_grp_add (grp, req);
1324	++grp->length;
1325	req->grp = grp;
1326
1327	req->grp_prev = 0;
1328	req->grp_next = grp->grp_first;
1329
1330	if (grp->grp_first)
1331	grp->grp_first->grp_prev = req;
1332
1333	grp->grp_first = req;
1334	}	1132	}
1335	}
1336	}	1133	}
		1134
		1135	void
		1136	cancel_subs (aio_req_ornot req)
		1137	CODE:
		1138	req_cancel_subs (req);
1337		1139
1338	void	1140	void
1339	result (aio_req grp, ...)	1141	result (aio_req grp, ...)
1340	CODE:	1142	CODE:
1341	{	1143	{
1342	int i;	1144	int i;
		1145	AV *av;
		1146
		1147	grp->errorno = errno;
		1148
1343	AV *av = newAV ();	1149	av = newAV ();
1344		1150
1345	for (i = 1; i < items; ++i )	1151	for (i = 1; i < items; ++i )
1346	av_push (av, newSVsv (ST (i)));	1152	av_push (av, newSVsv (ST (i)));
1347		1153
1348	SvREFCNT_dec (grp->data);	1154	SvREFCNT_dec (grp->sv1);
1349	grp->data = (SV *)av;	1155	grp->sv1 = (SV *)av;
1350	}	1156	}
1351		1157
1352	void	1158	void
		1159	errno (aio_req grp, int errorno = errno)
		1160	CODE:
		1161	grp->errorno = errorno;
		1162
		1163	void
1353	feed_limit (aio_req grp, int limit)	1164	limit (aio_req grp, int limit)
1354	CODE:	1165	CODE:
1355	grp->fd2 = limit;	1166	eio_grp_limit (grp, limit);
1356	aio_grp_feed (grp);
1357		1167
1358	void	1168	void
1359	feed (aio_req grp, SV *callback=&PL_sv_undef)	1169	feed (aio_req grp, SV *callback=&PL_sv_undef)
1360	CODE:	1170	CODE:
1361	{	1171	{
1362	SvREFCNT_dec (grp->fh2);	1172	SvREFCNT_dec (grp->sv2);
1363	grp->fh2 = newSVsv (callback);	1173	grp->sv2 = newSVsv (callback);
		1174	grp->feed = aio_grp_feed;
1364		1175
1365	if (grp->fd2 <= 0)	1176	if (grp->int2 <= 0)
1366	grp->fd2 = 2;	1177	grp->int2 = 2;
1367		1178
1368	aio_grp_feed (grp);	1179	eio_grp_limit (grp, grp->int2);
1369	}	1180	}
1370		1181

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