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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.61 by root, Mon Oct 23 22:44:21 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	SV *data, *callback;	105	SV *callback; \
72	SV *fh, *fh2;	106	SV *sv1, *sv2; \
73	void *dataptr, *data2ptr;
74	Stat_t *statdata;
75	off_t offset;
76	size_t length;
77	ssize_t result;
78
79	STRLEN dataoffset;	107	STRLEN stroffset; \
80	int type;	108	SV *self;
81	int fd, fd2;
82	int errorno;
83	mode_t mode; /* open */
84		109
85	unsigned char flags;	110	#define EIO_NO_WRAPPERS 1
86	unsigned char pri;
87		111
88	SV *self; /* the perl counterpart of this request, if any */	112	#include "libeio/eio.h"
89	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;	113
90	} aio_cb;	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	enum {	128	static SV *on_next_submit;
100	PRI_MIN = -4,	129	static int next_pri = EIO_PRI_DEFAULT;
101	PRI_MAX = 4,
102
103	DEFAULT_PRI = 0,
104	PRI_BIAS = -PRI_MIN,
105	};
106
107	static int next_pri = DEFAULT_PRI + PRI_BIAS;
108
109	static int started, wanted;
110	static volatile int nreqs;
111	static int max_outstanding = 1<<30;	130	static int max_outstanding;
112	static int respipe [2];
113		131
114	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	132	static int respipe_osf [2], respipe [2] = { -1, -1 };
115	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
116	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
117		133
118	static volatile aio_req reqs, reqe; /* queue start, queue end */	134	static void req_destroy (aio_req req);
119	static volatile aio_req ress, rese; /* queue start, queue end */
120
121	static void req_invoke (aio_req req);	135	static void req_cancel (aio_req req);
122	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	}
123		150
124	/* must be called at most once */	151	/* must be called at most once */
125	static SV *req_sv (aio_req req, const char *klass)	152	static SV *req_sv (aio_req req, const char *klass)
126	{	153	{
127	if (!req->self)	154	if (!req->self)
…		…
145	return mg ? (aio_req)mg->mg_ptr : 0;	172	return mg ? (aio_req)mg->mg_ptr : 0;
146	}	173	}
147		174
148	static void aio_grp_feed (aio_req grp)	175	static void aio_grp_feed (aio_req grp)
149	{	176	{
150	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	177	if (grp->sv2 && SvOK (grp->sv2))
151	{	178	{
152	int old_len = grp->length;	179	dSP;
153		180
154	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)
155	{	225	{
156	dSP;	226	case EIO_READDIR:
		227	{
		228	SV *rv = &PL_sv_undef;
157		229
158	ENTER;	230	if (req->result >= 0)
159	SAVETMPS;	231	{
160	PUSHMARK (SP);	232	int i;
161	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	233	char *buf = req->ptr2;
162	PUTBACK;	234	AV *av = newAV ();
163	call_sv (grp->fh2, G_VOID | G_EVAL);	235
164	SPAGAIN;	236	av_extend (av, req->result - 1);
165	FREETMPS;	237
166	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;
167	}	334	}
168		335
169	/* stop if no progress has been made */	336	errno = req->errorno;
170	if (old_len == grp->length)	337
171	{	338	PUTBACK;
172	SvREFCNT_dec (grp->fh2);	339	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
173	grp->fh2 = 0;	340	SPAGAIN;
174	break;	341
175	}	342	FREETMPS;
		343	LEAVE;
		344
		345	PUTBACK;
176	}	346	}
177	}
178		347
179	static void aio_grp_dec (aio_req grp)	348	return !!SvTRUE (ERRSV);
180	{
181	--grp->length;
182
183	/* call feeder, if applicable */
184	aio_grp_feed (grp);
185
186	/* finish, if done */
187	if (!grp->length && grp->fd)
188	{
189	req_invoke (grp);
190	req_free (grp);
191	}
192	}	349	}
193		350
194	static void poll_wait ()
195	{
196	while (nreqs)
197	{
198	aio_req req;
199	pthread_mutex_lock (&reslock);
200	req = ress;
201	pthread_mutex_unlock (&reslock);
202
203	if (req)
204	return;
205
206	fd_set rfd;
207	FD_ZERO(&rfd);
208	FD_SET(respipe [0], &rfd);
209
210	select (respipe [0] + 1, &rfd, 0, 0, 0);
211	}
212	}
213
214	static void req_invoke (aio_req req)
215	{
216	dSP;
217	int errorno = errno;
218
219	if (req->flags & FLAG_CANCELLED || !SvOK (req->callback))
220	return;
221
222	errno = req->errorno;
223
224	ENTER;
225	SAVETMPS;
226	PUSHMARK (SP);
227	EXTEND (SP, 1);
228
229	switch (req->type)
230	{
231	case REQ_READDIR:
232	{
233	SV *rv = &PL_sv_undef;
234
235	if (req->result >= 0)
236	{
237	char *buf = req->data2ptr;
238	AV *av = newAV ();
239
240	while (req->result)
241	{
242	SV *sv = newSVpv (buf, 0);
243
244	av_push (av, sv);
245	buf += SvCUR (sv) + 1;
246	req->result--;
247	}
248
249	rv = sv_2mortal (newRV_noinc ((SV *)av));
250	}
251
252	PUSHs (rv);
253	}
254	break;
255
256	case REQ_OPEN:
257	{
258	/* convert fd to fh */
259	SV *fh;
260
261	PUSHs (sv_2mortal (newSViv (req->result)));
262	PUTBACK;
263	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
264	SPAGAIN;
265
266	fh = SvREFCNT_inc (POPs);
267
268	PUSHMARK (SP);
269	XPUSHs (sv_2mortal (fh));
270	}
271	break;
272
273	case REQ_GROUP:
274	req->fd = 2; /* mark group as finished */
275
276	if (req->data)
277	{
278	int i;
279	AV *av = (AV *)req->data;
280
281	EXTEND (SP, AvFILL (av) + 1);
282	for (i = 0; i <= AvFILL (av); ++i)
283	PUSHs (*av_fetch (av, i, 0));
284	}
285	break;
286
287	case REQ_NOP:
288	case REQ_SLEEP:
289	break;
290
291	default:
292	PUSHs (sv_2mortal (newSViv (req->result)));
293	break;
294	}
295
296
297	PUTBACK;
298	call_sv (req->callback, G_VOID | G_EVAL);
299	SPAGAIN;
300
301	FREETMPS;
302	LEAVE;
303
304	errno = errorno;
305
306	if (SvTRUE (ERRSV))
307	{
308	req_free (req);
309	croak (0);
310	}
311	}
312
313	static void req_free (aio_req req)	351	static void req_destroy (aio_req req)
314	{	352	{
315	if (req->grp)
316	{
317	aio_req grp = req->grp;
318
319	/* unlink request */
320	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
321	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
322
323	if (grp->grp_first == req)
324	grp->grp_first = req->grp_next;
325
326	aio_grp_dec (grp);
327	}
328
329	if (req->self)	353	if (req->self)
330	{	354	{
331	sv_unmagic (req->self, PERL_MAGIC_ext);	355	sv_unmagic (req->self, PERL_MAGIC_ext);
332	SvREFCNT_dec (req->self);	356	SvREFCNT_dec (req->self);
333	}	357	}
334		358
335	SvREFCNT_dec (req->data);
336	SvREFCNT_dec (req->fh);	359	SvREFCNT_dec (req->sv1);
337	SvREFCNT_dec (req->fh2);	360	SvREFCNT_dec (req->sv2);
338	SvREFCNT_dec (req->callback);	361	SvREFCNT_dec (req->callback);
339	Safefree (req->statdata);
340
341	if (req->type == REQ_READDIR && req->result >= 0)
342	free (req->data2ptr);
343		362
344	Safefree (req);	363	Safefree (req);
345	}	364	}
346		365
347	static void req_cancel (aio_req req)	366	static void req_cancel_subs (aio_req grp)
348	{	367	{
349	req->flags |= FLAG_CANCELLED;	368	aio_req sub;
350		369
351	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)
352	{	401	{
353	aio_req sub;	402	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
		403	croak ("unable to initialize result pipe(2)");
354		404
355	for (sub = req->grp_first; sub; sub = sub->grp_next)	405	respipe_close (respipe [0]);
356	req_cancel (sub);	406	respipe [0] = old_readfd;
357	}	407	}
358	}
359		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
360	static int poll_cb ()	447	static int poll_cb (void)
361	{	448	{
362	dSP;
363	int count = 0;
364	int do_croak = 0;
365	aio_req req;
366
367	for (;;)	449	for (;;)
368	{	450	{
369	pthread_mutex_lock (&reslock);	451	int res = eio_poll ();
370	req = ress;
371		452
372	if (req)	453	if (res > 0)
373	{
374	ress = req->next;
375
376	if (!ress)
377	{
378	/* read any signals sent by the worker threads */
379	char buf [32];
380	while (read (respipe [0], buf, 32) == 32)
381	;
382
383	rese = 0;
384	}
385	}
386
387	pthread_mutex_unlock (&reslock);
388
389	if (!req)
390	break;	454	croak (0);
391		455
392	--nreqs;	456	if (!max_outstanding || max_outstanding > eio_nreqs ())
		457	return res;
393		458
394	if (req->type == REQ_QUIT)	459	poll_wait ();
395	started--;
396	else if (req->type == REQ_GROUP && req->length)
397	{
398	req->fd = 1; /* mark request as delayed */
399	continue;
400	}
401	else
402	{
403	if (req->type == REQ_READ)
404	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
405
406	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
407	SvREADONLY_off (req->data);
408
409	if (req->statdata)
410	{
411	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
412	PL_laststatval = req->result;
413	PL_statcache = *(req->statdata);
414	}
415
416	req_invoke (req);
417
418	count++;
419	}
420
421	req_free (req);
422	}	460	}
423
424	return count;
425	}	461	}
426		462
427	static void *aio_proc(void *arg);
428
429	static void start_thread (void)	463	static void atfork_child (void)
430	{	464	{
431	sigset_t fullsigset, oldsigset;	465	create_respipe ();
432	pthread_t tid;
433	pthread_attr_t attr;
434
435	pthread_attr_init (&attr);
436	pthread_attr_setstacksize (&attr, STACKSIZE);
437	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
438
439	sigfillset (&fullsigset);
440	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
441
442	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
443	started++;
444
445	sigprocmask (SIG_SETMASK, &oldsigset, 0);
446	}	466	}
447		467
448	static void req_send (aio_req req)	468	static SV *
		469	get_cb (SV *cb_sv)
449	{	470	{
450	while (started < wanted && nreqs >= started)	471	HV *st;
451	start_thread ();	472	GV *gvp;
		473	CV *cv;
452		474
453	++nreqs;	475	if (!SvOK (cb_sv))
454
455	pthread_mutex_lock (&reqlock);
456
457	req->next = 0;
458
459	if (reqe)
460	{
461	reqe->next = req;
462	reqe = req;
463	}
464	else
465	reqe = reqs = req;
466
467	pthread_cond_signal (&reqwait);
468	pthread_mutex_unlock (&reqlock);
469
470	if (nreqs > max_outstanding)
471	for (;;)
472	{
473	poll_cb ();
474
475	if (nreqs <= max_outstanding)
476	break;
477
478	poll_wait ();
479	}
480	}
481
482	static void end_thread (void)
483	{
484	aio_req req;
485	Newz (0, req, 1, aio_cb);
486	req->type = REQ_QUIT;
487
488	req_send (req);
489	}
490
491	static void min_parallel (int nthreads)
492	{
493	if (wanted < nthreads)
494	wanted = nthreads;
495	}
496
497	static void max_parallel (int nthreads)
498	{
499	int cur = started;
500
501	if (wanted > nthreads)
502	wanted = nthreads;
503
504	while (cur > wanted)
505	{
506	end_thread ();
507	cur--;
508	}
509
510	while (started > wanted)
511	{
512	poll_wait ();
513	poll_cb ();
514	}
515	}
516
517	static void create_pipe ()
518	{
519	if (pipe (respipe))
520	croak ("unable to initialize result pipe");
521
522	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
523	croak ("cannot set result pipe to nonblocking mode");
524
525	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
526	croak ("cannot set result pipe to nonblocking mode");
527	}
528
529	/*****************************************************************************/
530	/* work around various missing functions */
531
532	#if !HAVE_PREADWRITE
533	# define pread aio_pread
534	# define pwrite aio_pwrite
535
536	/*
537	* make our pread/pwrite safe against themselves, but not against
538	* normal read/write by using a mutex. slows down execution a lot,
539	* but that's your problem, not mine.
540	*/
541	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
542
543	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
544	{
545	ssize_t res;
546	off_t ooffset;
547
548	pthread_mutex_lock (&preadwritelock);
549	ooffset = lseek (fd, 0, SEEK_CUR);
550	lseek (fd, offset, SEEK_SET);
551	res = read (fd, buf, count);
552	lseek (fd, ooffset, SEEK_SET);
553	pthread_mutex_unlock (&preadwritelock);
554
555	return res;
556	}
557
558	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
559	{
560	ssize_t res;
561	off_t ooffset;
562
563	pthread_mutex_lock (&preadwritelock);
564	ooffset = lseek (fd, 0, SEEK_CUR);
565	lseek (fd, offset, SEEK_SET);
566	res = write (fd, buf, count);
567	lseek (fd, offset, SEEK_SET);
568	pthread_mutex_unlock (&preadwritelock);
569
570	return res;
571	}
572	#endif
573
574	#if !HAVE_FDATASYNC
575	# define fdatasync fsync
576	#endif
577
578	#if !HAVE_READAHEAD
579	# define readahead aio_readahead
580
581	static ssize_t readahead (int fd, off_t offset, size_t count)
582	{
583	char readahead_buf[4096];
584
585	while (count > 0)
586	{
587	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
588
589	pread (fd, readahead_buf, len, offset);
590	offset += len;
591	count -= len;
592	}
593
594	errno = 0;
595	}
596	#endif
597
598	#if !HAVE_READDIR_R
599	# define readdir_r aio_readdir_r
600
601	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
602
603	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
604	{
605	struct dirent *e;
606	int errorno;
607
608	pthread_mutex_lock (&readdirlock);
609
610	e = readdir (dirp);
611	errorno = errno;
612
613	if (e)
614	{
615	*res = ent;
616	strcpy (ent->d_name, e->d_name);
617	}
618	else
619	*res = 0;
620
621	pthread_mutex_unlock (&readdirlock);
622
623	errno = errorno;
624	return e ? 0 : -1;
625	}
626	#endif
627
628	/* sendfile always needs emulation */
629	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
630	{
631	ssize_t res;
632
633	if (!count)
634	return 0;	476	return 0;
635		477
636	#if HAVE_SENDFILE	478	cv = sv_2cv (cb_sv, &st, &gvp, 0);
637	# if __linux
638	res = sendfile (ofd, ifd, &offset, count);
639		479
640	# elif __freebsd	480	if (!cv)
641	/*	481	croak ("IO::AIO callback must be undef or a CODE reference");
642	* Of course, the freebsd sendfile is a dire hack with no thoughts
643	* wasted on making it similar to other I/O functions.
644	*/
645	{
646	off_t sbytes;
647	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
648		482
649	if (res < 0 && sbytes)	483	return (SV *)cv;
650	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
651	res = sbytes;
652	}
653
654	# elif __hpux
655	res = sendfile (ofd, ifd, offset, count, 0, 0);
656
657	# elif __solaris
658	{
659	struct sendfilevec vec;
660	size_t sbytes;
661
662	vec.sfv_fd = ifd;
663	vec.sfv_flag = 0;
664	vec.sfv_off = offset;
665	vec.sfv_len = count;
666
667	res = sendfilev (ofd, &vec, 1, &sbytes);
668
669	if (res < 0 && sbytes)
670	res = sbytes;
671	}
672
673	# endif
674	#else
675	res = -1;
676	errno = ENOSYS;
677	#endif
678
679	if (res < 0
680	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
681	#if __solaris
682	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
683	#endif
684	)
685	)
686	{
687	/* emulate sendfile. this is a major pain in the ass */
688	char buf[4096];
689	res = 0;
690
691	while (count)
692	{
693	ssize_t cnt;
694
695	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
696
697	if (cnt <= 0)
698	{
699	if (cnt && !res) res = -1;
700	break;
701	}
702
703	cnt = write (ofd, buf, cnt);
704
705	if (cnt <= 0)
706	{
707	if (cnt && !res) res = -1;
708	break;
709	}
710
711	offset += cnt;
712	res += cnt;
713	count -= cnt;
714	}
715	}
716
717	return res;
718	}
719
720	/* read a full directory */
721	static int scandir_ (const char *path, void **namesp)
722	{
723	DIR *dirp = opendir (path);
724	union
725	{
726	struct dirent d;
727	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
728	} u;
729	struct dirent *entp;
730	char *name, *names;
731	int memlen = 4096;
732	int memofs = 0;
733	int res = 0;
734	int errorno;
735
736	if (!dirp)
737	return -1;
738
739	names = malloc (memlen);
740
741	for (;;)
742	{
743	errno = 0, readdir_r (dirp, &u.d, &entp);
744
745	if (!entp)
746	break;
747
748	name = entp->d_name;
749
750	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
751	{
752	int len = strlen (name) + 1;
753
754	res++;
755
756	while (memofs + len > memlen)
757	{
758	memlen *= 2;
759	names = realloc (names, memlen);
760	if (!names)
761	break;
762	}
763
764	memcpy (names + memofs, name, len);
765	memofs += len;
766	}
767	}
768
769	errorno = errno;
770	closedir (dirp);
771
772	if (errorno)
773	{
774	free (names);
775	errno = errorno;
776	res = -1;
777	}
778
779	*namesp = (void *)names;
780	return res;
781	}
782
783	/*****************************************************************************/
784
785	static void *aio_proc (void *thr_arg)
786	{
787	aio_req req;
788	int type;
789
790	do
791	{
792	pthread_mutex_lock (&reqlock);
793
794	for (;;)
795	{
796	req = reqs;
797
798	if (reqs)
799	{
800	reqs = reqs->next;
801	if (!reqs) reqe = 0;
802	}
803
804	if (req)
805	break;
806
807	pthread_cond_wait (&reqwait, &reqlock);
808	}
809
810	pthread_mutex_unlock (&reqlock);
811
812	errno = 0; /* strictly unnecessary */
813	type = req->type; /* remember type for QUIT check */
814
815	if (!(req->flags & FLAG_CANCELLED))
816	switch (type)
817	{
818	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
819	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
820
821	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
822	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
823
824	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
825	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
826	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
827
828	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
829	case REQ_CLOSE: req->result = close (req->fd); break;
830	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
831	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
832	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
833	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
834	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
835
836	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
837	case REQ_FSYNC: req->result = fsync (req->fd); break;
838	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
839
840	case REQ_SLEEP:
841	{
842	struct timeval tv;
843
844	tv.tv_sec = req->fd;
845	tv.tv_usec = req->fd2;
846
847	req->result = select (0, 0, 0, 0, &tv);
848	}
849
850	case REQ_GROUP:
851	case REQ_NOP:
852	case REQ_QUIT:
853	break;
854
855	default:
856	req->result = ENOSYS;
857	break;
858	}
859
860	req->errorno = errno;
861
862	pthread_mutex_lock (&reslock);
863
864	req->next = 0;
865
866	if (rese)
867	{
868	rese->next = req;
869	rese = req;
870	}
871	else
872	{
873	rese = ress = req;
874
875	/* write a dummy byte to the pipe so fh becomes ready */
876	write (respipe [1], &respipe, 1);
877	}
878
879	pthread_mutex_unlock (&reslock);
880	}
881	while (type != REQ_QUIT);
882
883	return 0;
884	}
885
886	/*****************************************************************************/
887
888	static void atfork_prepare (void)
889	{
890	pthread_mutex_lock (&reqlock);
891	pthread_mutex_lock (&reslock);
892	#if !HAVE_PREADWRITE
893	pthread_mutex_lock (&preadwritelock);
894	#endif
895	#if !HAVE_READDIR_R
896	pthread_mutex_lock (&readdirlock);
897	#endif
898	}
899
900	static void atfork_parent (void)
901	{
902	#if !HAVE_READDIR_R
903	pthread_mutex_unlock (&readdirlock);
904	#endif
905	#if !HAVE_PREADWRITE
906	pthread_mutex_unlock (&preadwritelock);
907	#endif
908	pthread_mutex_unlock (&reslock);
909	pthread_mutex_unlock (&reqlock);
910	}
911
912	static void atfork_child (void)
913	{
914	aio_req prv;
915
916	started = 0;
917
918	while (reqs)
919	{
920	prv = reqs;
921	reqs = prv->next;
922	req_free (prv);
923	}
924
925	reqs = reqe = 0;
926
927	while (ress)
928	{
929	prv = ress;
930	ress = prv->next;
931	req_free (prv);
932	}
933
934	ress = rese = 0;
935
936	close (respipe [0]);
937	close (respipe [1]);
938	create_pipe ();
939
940	atfork_parent ();
941	}	484	}
942		485
943	#define dREQ \	486	#define dREQ \
		487	SV *cb_cv; \
944	aio_req req; \	488	aio_req req; \
945	int req_pri = next_pri; \	489	int req_pri = next_pri; \
946	next_pri = DEFAULT_PRI + PRI_BIAS; \	490	next_pri = EIO_PRI_DEFAULT; \
947	\	491	\
948	if (SvOK (callback) && !SvROK (callback)) \	492	cb_cv = get_cb (callback); \
949	croak ("callback must be undef or of reference type"); \
950	\	493	\
951	Newz (0, req, 1, aio_cb); \	494	Newz (0, req, 1, eio_req); \
952	if (!req) \	495	if (!req) \
953	croak ("out of memory during aio_req allocation"); \	496	croak ("out of memory during eio_req allocation"); \
954	\	497	\
955	req->callback = newSVsv (callback); \	498	req->callback = SvREFCNT_inc (cb_cv); \
956	req->pri = req_pri	499	req->pri = req_pri
957		500
958	#define REQ_SEND \	501	#define REQ_SEND \
		502	PUTBACK; \
959	req_send (req); \	503	req_submit (req); \
		504	SPAGAIN; \
960	\	505	\
961	if (GIMME_V != G_VOID) \	506	if (GIMME_V != G_VOID) \
962	XPUSHs (req_sv (req, AIO_REQ_KLASS));	507	XPUSHs (req_sv (req, AIO_REQ_KLASS));
963		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
964	MODULE = IO::AIO PACKAGE = IO::AIO	520	MODULE = IO::AIO PACKAGE = IO::AIO
965		521
966	PROTOTYPES: ENABLE	522	PROTOTYPES: ENABLE
967		523
968	BOOT:	524	BOOT:
969	{	525	{
970	HV *stash = gv_stashpv ("IO::AIO", 1);	526	stash = gv_stashpv ("IO::AIO", 1);
		527
971	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	528	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
972	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	529	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
973	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));
974		540
975	create_pipe ();	541	create_respipe ();
976	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
977	}
978		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
979	void	550	void
980	min_parallel (nthreads)	551	max_poll_reqs (int nreqs)
981	int nthreads
982	PROTOTYPE: $	552	PROTOTYPE: $
		553	CODE:
		554	eio_set_max_poll_reqs (nreqs);
983		555
984	void	556	void
985	max_parallel (nthreads)	557	max_poll_time (double nseconds)
986	int nthreads
987	PROTOTYPE: $	558	PROTOTYPE: $
988
989	int
990	max_outstanding (nreqs)
991	int nreqs
992	PROTOTYPE: $
993	CODE:	559	CODE:
994	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:
995	max_outstanding = nreqs;	584	max_outstanding = maxreqs;
996		585
997	void	586	void
998	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	587	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
999	SV * pathname
1000	int flags
1001	int mode
1002	SV * callback
1003	PROTOTYPE: $$$;$	588	PROTOTYPE: $$$;$
1004	PPCODE:	589	PPCODE:
1005	{	590	{
1006	dREQ;	591	dREQ;
1007		592
1008	req->type = REQ_OPEN;	593	req->type = EIO_OPEN;
1009	req->data = newSVsv (pathname);	594	req->sv1 = newSVsv (pathname);
1010	req->dataptr = SvPVbyte_nolen (req->data);	595	req->ptr1 = SvPVbyte_nolen (req->sv1);
1011	req->fd = flags;	596	req->int1 = flags;
1012	req->mode = mode;	597	req->int2 = mode;
1013		598
1014	REQ_SEND;	599	REQ_SEND;
1015	}	600	}
1016		601
1017	void	602	void
1018	aio_close (fh,callback=&PL_sv_undef)	603	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1019	SV * fh
1020	SV * callback
1021	PROTOTYPE: $;$	604	PROTOTYPE: $;$
1022	ALIAS:	605	ALIAS:
1023	aio_close = REQ_CLOSE
1024	aio_fsync = REQ_FSYNC	606	aio_fsync = EIO_FSYNC
1025	aio_fdatasync = REQ_FDATASYNC	607	aio_fdatasync = EIO_FDATASYNC
1026	PPCODE:	608	PPCODE:
1027	{	609	{
		610	int fd = extract_fd (fh, 0);
1028	dREQ;	611	dREQ;
1029		612
1030	req->type = ix;	613	req->type = ix;
1031	req->fh = newSVsv (fh);	614	req->sv1 = newSVsv (fh);
1032	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	615	req->int1 = fd;
1033		616
1034	REQ_SEND (req);	617	REQ_SEND (req);
1035	}	618	}
1036		619
1037	void	620	void
		621	aio_sync_file_range (SV *fh, SV *offset, SV *nbytes, IV flags, SV *callback=&PL_sv_undef)
		622	PROTOTYPE: $$$$;$
		623	PPCODE:
		624	{
		625	int fd = extract_fd (fh, 0);
		626	dREQ;
		627
		628	req->type = EIO_SYNC_FILE_RANGE;
		629	req->sv1 = newSVsv (fh);
		630	req->int1 = fd;
		631	req->offs = SvVAL64 (offset);
		632	req->size = SvVAL64 (nbytes);
		633	req->int2 = flags;
		634
		635	REQ_SEND (req);
		636	}
		637
		638	void
		639	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		640	PROTOTYPE: $;$
		641	PPCODE:
		642	{
		643	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		644	int fd = extract_fd (fh, 0);
		645	dREQ;
		646
		647	if (close_pipe < 0)
		648	{
		649	int pipefd [2];
		650
		651	if (pipe (pipefd) < 0
		652	|| close (pipefd [1]) < 0
		653	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		654	abort (); /*D*/
		655
		656	close_pipe = pipefd [0];
		657	}
		658
		659	req->type = EIO_DUP2;
		660	req->int1 = close_pipe;
		661	req->sv2 = newSVsv (fh);
		662	req->int2 = fd;
		663
		664	REQ_SEND (req);
		665	}
		666
		667	void
1038	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	668	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1039	SV * fh
1040	UV offset
1041	UV length
1042	SV * data
1043	UV dataoffset
1044	SV * callback
1045	ALIAS:	669	ALIAS:
1046	aio_read = REQ_READ	670	aio_read = EIO_READ
1047	aio_write = REQ_WRITE	671	aio_write = EIO_WRITE
1048	PROTOTYPE: $$$$$;$	672	PROTOTYPE: $$$$$;$
1049	PPCODE:	673	PPCODE:
1050	{	674	{
1051	aio_req req;
1052	STRLEN svlen;	675	STRLEN svlen;
		676	int fd = extract_fd (fh, ix == EIO_WRITE);
1053	char *svptr = SvPVbyte (data, svlen);	677	char *svptr = SvPVbyte (data, svlen);
1054		678	UV len = SvUV (length);
1055	SvUPGRADE (data, SVt_PV);
1056	SvPOK_on (data);
1057		679
1058	if (dataoffset < 0)	680	if (dataoffset < 0)
1059	dataoffset += svlen;	681	dataoffset += svlen;
1060		682
1061	if (dataoffset < 0 || dataoffset > svlen)	683	if (dataoffset < 0 || dataoffset > svlen)
1062	croak ("data offset outside of string");	684	croak ("dataoffset outside of data scalar");
1063		685
1064	if (ix == REQ_WRITE)	686	if (ix == EIO_WRITE)
1065	{	687	{
1066	/* write: check length and adjust. */	688	/* write: check length and adjust. */
1067	if (length < 0 || length + dataoffset > svlen)	689	if (!SvOK (length) || len + dataoffset > svlen)
1068	length = svlen - dataoffset;	690	len = svlen - dataoffset;
1069	}	691	}
1070	else	692	else
1071	{	693	{
1072	/* read: grow scalar as necessary */	694	/* read: check type and grow scalar as necessary */
		695	SvUPGRADE (data, SVt_PV);
1073	svptr = SvGROW (data, length + dataoffset);	696	svptr = SvGROW (data, len + dataoffset + 1);
1074	}	697	}
1075
1076	if (length < 0)
1077	croak ("length must not be negative");
1078		698
1079	{	699	{
1080	dREQ;	700	dREQ;
1081		701
1082	req->type = ix;	702	req->type = ix;
1083	req->fh = newSVsv (fh);	703	req->sv1 = newSVsv (fh);
1084	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	704	req->int1 = fd;
1085	: IoOFP (sv_2io (fh)));	705	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1086	req->offset = offset;	706	req->size = len;
1087	req->length = length;
1088	req->data = SvREFCNT_inc (data);	707	req->sv2 = SvREFCNT_inc (data);
1089	req->dataptr = (char *)svptr + dataoffset;	708	req->ptr2 = (char *)svptr + dataoffset;
		709	req->stroffset = dataoffset;
1090		710
1091	if (!SvREADONLY (data))	711	if (!SvREADONLY (data))
1092	{	712	{
1093	SvREADONLY_on (data);	713	SvREADONLY_on (data);
1094	req->data2ptr = (void *)data;	714	req->flags |= FLAG_SV2_RO_OFF;
1095	}	715	}
1096		716
1097	REQ_SEND;	717	REQ_SEND;
1098	}	718	}
1099	}	719	}
1100		720
1101	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
1102	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)
1103	SV * out_fh
1104	SV * in_fh
1105	UV in_offset
1106	UV length
1107	SV * callback
1108	PROTOTYPE: $$$$;$	738	PROTOTYPE: $$$$;$
1109	PPCODE:	739	PPCODE:
1110	{	740	{
		741	int ifd = extract_fd (in_fh , 0);
		742	int ofd = extract_fd (out_fh, 0);
1111	dREQ;	743	dREQ;
1112		744
1113	req->type = REQ_SENDFILE;	745	req->type = EIO_SENDFILE;
1114	req->fh = newSVsv (out_fh);	746	req->sv1 = newSVsv (out_fh);
1115	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	747	req->int1 = ofd;
1116	req->fh2 = newSVsv (in_fh);	748	req->sv2 = newSVsv (in_fh);
1117	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	749	req->int2 = ifd;
1118	req->offset = in_offset;	750	req->offs = SvVAL64 (in_offset);
1119	req->length = length;	751	req->size = length;
1120		752
1121	REQ_SEND;	753	REQ_SEND;
1122	}	754	}
1123		755
1124	void	756	void
1125	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	757	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1126	SV * fh
1127	UV offset
1128	IV length
1129	SV * callback
1130	PROTOTYPE: $$$;$	758	PROTOTYPE: $$$;$
1131	PPCODE:	759	PPCODE:
1132	{	760	{
		761	int fd = extract_fd (fh, 0);
1133	dREQ;	762	dREQ;
1134		763
1135	req->type = REQ_READAHEAD;	764	req->type = EIO_READAHEAD;
1136	req->fh = newSVsv (fh);	765	req->sv1 = newSVsv (fh);
1137	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	766	req->int1 = fd;
1138	req->offset = offset;	767	req->offs = SvVAL64 (offset);
1139	req->length = length;	768	req->size = length;
1140		769
1141	REQ_SEND;	770	REQ_SEND;
1142	}	771	}
1143		772
1144	void	773	void
1145	aio_stat (fh_or_path,callback=&PL_sv_undef)	774	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1146	SV * fh_or_path
1147	SV * callback
1148	ALIAS:	775	ALIAS:
1149	aio_stat = REQ_STAT	776	aio_stat = EIO_STAT
1150	aio_lstat = REQ_LSTAT	777	aio_lstat = EIO_LSTAT
1151	PPCODE:	778	PPCODE:
1152	{	779	{
1153	dREQ;	780	dREQ;
1154		781
1155	New (0, req->statdata, 1, Stat_t);	782	req->sv1 = newSVsv (fh_or_path);
1156	if (!req->statdata)
1157	{
1158	req_free (req);
1159	croak ("out of memory during aio_req->statdata allocation");
1160	}
1161		783
1162	if (SvPOK (fh_or_path))	784	if (SvPOK (req->sv1))
1163	{	785	{
1164	req->type = ix;	786	req->type = ix;
1165	req->data = newSVsv (fh_or_path);
1166	req->dataptr = SvPVbyte_nolen (req->data);	787	req->ptr1 = SvPVbyte_nolen (req->sv1);
1167	}	788	}
1168	else	789	else
1169	{	790	{
1170	req->type = REQ_FSTAT;	791	req->type = EIO_FSTAT;
1171	req->fh = newSVsv (fh_or_path);
1172	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	792	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1173	}	793	}
1174		794
1175	REQ_SEND;	795	REQ_SEND;
1176	}	796	}
1177		797
1178	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
1179	aio_unlink (pathname,callback=&PL_sv_undef)	896	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1180	SV * pathname
1181	SV * callback
1182	ALIAS:	897	ALIAS:
1183	aio_unlink = REQ_UNLINK	898	aio_unlink = EIO_UNLINK
1184	aio_rmdir = REQ_RMDIR	899	aio_rmdir = EIO_RMDIR
1185	aio_readdir = REQ_READDIR	900	aio_readdir = EIO_READDIR
1186	PPCODE:	901	PPCODE:
1187	{	902	{
1188	dREQ;	903	dREQ;
1189		904
1190	req->type = ix;	905	req->type = ix;
1191	req->data = newSVsv (pathname);	906	req->sv1 = newSVsv (pathname);
1192	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);
1193		927
1194	REQ_SEND;	928	REQ_SEND;
1195	}	929	}
1196		930
1197	void	931	void
1198	aio_link (oldpath,newpath,callback=&PL_sv_undef)	932	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1199	SV * oldpath
1200	SV * newpath
1201	SV * callback
1202	ALIAS:
1203	aio_link = REQ_LINK
1204	aio_symlink = REQ_SYMLINK
1205	aio_rename = REQ_RENAME
1206	PPCODE:	933	PPCODE:
1207	{	934	{
1208	dREQ;	935	dREQ;
1209		936
1210	req->type = ix;	937	req->type = EIO_MKNOD;
1211	req->fh = newSVsv (oldpath);	938	req->sv1 = newSVsv (pathname);
1212	req->data2ptr = SvPVbyte_nolen (req->fh);	939	req->ptr1 = SvPVbyte_nolen (req->sv1);
1213	req->data = newSVsv (newpath);	940	req->int2 = (mode_t)mode;
1214	req->dataptr = SvPVbyte_nolen (req->data);	941	req->offs = dev;
1215		942
1216	REQ_SEND;	943	REQ_SEND;
1217	}	944	}
1218		945
1219	void	946	void
1220	aio_sleep (delay,callback=&PL_sv_undef)	947	aio_busy (double delay, SV *callback=&PL_sv_undef)
1221	double delay
1222	SV * callback
1223	PPCODE:	948	PPCODE:
1224	{	949	{
1225	dREQ;	950	dREQ;
1226		951
1227	req->type = REQ_SLEEP;	952	req->type = EIO_BUSY;
1228	req->fd = delay < 0. ? 0 : delay;	953	req->nv1 = delay < 0. ? 0. : delay;
1229	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1230		954
1231	REQ_SEND;	955	REQ_SEND;
1232	}	956	}
1233		957
1234	void	958	void
1235	aio_group (callback=&PL_sv_undef)	959	aio_group (SV *callback=&PL_sv_undef)
1236	SV * callback
1237	PROTOTYPE: ;$	960	PROTOTYPE: ;$
1238	PPCODE:	961	PPCODE:
1239	{	962	{
1240	dREQ;	963	dREQ;
1241		964
1242	req->type = REQ_GROUP;	965	req->type = EIO_GROUP;
		966
1243	req_send (req);	967	req_submit (req);
1244
1245	XPUSHs (req_sv (req, AIO_GRP_KLASS));	968	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1246	}	969	}
1247		970
1248	void	971	void
1249	aio_nop (callback=&PL_sv_undef)	972	aio_nop (SV *callback=&PL_sv_undef)
1250	SV * callback	973	ALIAS:
		974	aio_nop = EIO_NOP
		975	aio_sync = EIO_SYNC
1251	PPCODE:	976	PPCODE:
1252	{	977	{
1253	dREQ;	978	dREQ;
1254		979
1255	req->type = REQ_NOP;	980	req->type = ix;
1256		981
1257	REQ_SEND;	982	REQ_SEND;
1258	}	983	}
1259		984
1260	#if 0	985	int
1261		986	aioreq_pri (int pri = 0)
1262	void	987	PROTOTYPE: ;$
1263	aio_pri (int pri = DEFAULT_PRI)
1264	CODE:	988	CODE:
		989	RETVAL = next_pri;
		990	if (items > 0)
		991	{
1265	if (pri < PRI_MIN) pri = PRI_MIN;	992	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1266	if (pri > PRI_MAX) pri = PRI_MAX;	993	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1267	next_pri = pri + PRI_BIAS;	994	next_pri = pri;
		995	}
		996	OUTPUT:
		997	RETVAL
1268		998
1269	#endif	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;
1270		1006
1271	void	1007	void
1272	flush ()	1008	flush ()
1273	PROTOTYPE:	1009	PROTOTYPE:
1274	CODE:	1010	CODE:
1275	while (nreqs)	1011	while (eio_nreqs ())
1276	{	1012	{
1277	poll_wait ();	1013	poll_wait ();
1278	poll_cb ();	1014	poll_cb ();
1279	}	1015	}
1280		1016
1281	void	1017	int
1282	poll()	1018	poll()
1283	PROTOTYPE:	1019	PROTOTYPE:
1284	CODE:	1020	CODE:
1285	if (nreqs)
1286	{
1287	poll_wait ();	1021	poll_wait ();
1288	poll_cb ();	1022	RETVAL = poll_cb ();
1289	}	1023	OUTPUT:
		1024	RETVAL
1290		1025
1291	int	1026	int
1292	poll_fileno()	1027	poll_fileno()
1293	PROTOTYPE:	1028	PROTOTYPE:
1294	CODE:	1029	CODE:
…		…
1306		1041
1307	void	1042	void
1308	poll_wait()	1043	poll_wait()
1309	PROTOTYPE:	1044	PROTOTYPE:
1310	CODE:	1045	CODE:
1311	if (nreqs)
1312	poll_wait ();	1046	poll_wait ();
1313		1047
1314	int	1048	int
1315	nreqs()	1049	nreqs()
1316	PROTOTYPE:	1050	PROTOTYPE:
1317	CODE:	1051	CODE:
1318	RETVAL = nreqs;	1052	RETVAL = eio_nreqs ();
1319	OUTPUT:	1053	OUTPUT:
1320	RETVAL	1054	RETVAL
1321		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
1322	PROTOTYPES: DISABLE	1085	PROTOTYPES: DISABLE
1323		1086
1324	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1087	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1325		1088
1326	void	1089	void
1327	cancel (aio_req_ornot req)	1090	cancel (aio_req_ornot req)
1328	PROTOTYPE:
1329	CODE:	1091	CODE:
1330	req_cancel (req);	1092	eio_cancel (req);
1331		1093
1332	void	1094	void
1333	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1095	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1334	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
1335	SvREFCNT_dec (req->callback);	1105	SvREFCNT_dec (req->callback);
1336	req->callback = newSVsv (callback);	1106	req->callback = SvREFCNT_inc (cb_cv);
		1107	}
		1108	}
1337		1109
1338	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1110	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1339		1111
1340	void	1112	void
1341	add (aio_req grp, ...)	1113	add (aio_req grp, ...)
1342	PPCODE:	1114	PPCODE:
1343	{	1115	{
1344	int i;	1116	int i;
1345	aio_req req;
1346		1117
1347	if (grp->fd == 2)	1118	if (grp->int1 == 2)
1348	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");
1349		1120
1350	for (i = 1; i < items; ++i )	1121	for (i = 1; i < items; ++i )
1351	{	1122	{
		1123	aio_req req;
		1124
1352	if (GIMME_V != G_VOID)	1125	if (GIMME_V != G_VOID)
1353	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1126	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1354		1127
1355	req = SvAIO_REQ (ST (i));	1128	req = SvAIO_REQ (ST (i));
1356		1129
1357	if (req)	1130	if (req)
1358	{	1131	eio_grp_add (grp, req);
1359	++grp->length;
1360	req->grp = grp;
1361
1362	req->grp_prev = 0;
1363	req->grp_next = grp->grp_first;
1364
1365	if (grp->grp_first)
1366	grp->grp_first->grp_prev = req;
1367
1368	grp->grp_first = req;
1369	}	1132	}
1370	}
1371	}	1133	}
		1134
		1135	void
		1136	cancel_subs (aio_req_ornot req)
		1137	CODE:
		1138	req_cancel_subs (req);
1372		1139
1373	void	1140	void
1374	result (aio_req grp, ...)	1141	result (aio_req grp, ...)
1375	CODE:	1142	CODE:
1376	{	1143	{
1377	int i;	1144	int i;
		1145	AV *av;
		1146
		1147	grp->errorno = errno;
		1148
1378	AV *av = newAV ();	1149	av = newAV ();
1379		1150
1380	for (i = 1; i < items; ++i )	1151	for (i = 1; i < items; ++i )
1381	av_push (av, newSVsv (ST (i)));	1152	av_push (av, newSVsv (ST (i)));
1382		1153
1383	SvREFCNT_dec (grp->data);	1154	SvREFCNT_dec (grp->sv1);
1384	grp->data = (SV *)av;	1155	grp->sv1 = (SV *)av;
1385	}	1156	}
1386		1157
1387	void	1158	void
		1159	errno (aio_req grp, int errorno = errno)
		1160	CODE:
		1161	grp->errorno = errorno;
		1162
		1163	void
1388	feed_limit (aio_req grp, int limit)	1164	limit (aio_req grp, int limit)
1389	CODE:	1165	CODE:
1390	grp->fd2 = limit;	1166	eio_grp_limit (grp, limit);
1391	aio_grp_feed (grp);
1392		1167
1393	void	1168	void
1394	feed (aio_req grp, SV *callback=&PL_sv_undef)	1169	feed (aio_req grp, SV *callback=&PL_sv_undef)
1395	CODE:	1170	CODE:
1396	{	1171	{
1397	SvREFCNT_dec (grp->fh2);	1172	SvREFCNT_dec (grp->sv2);
1398	grp->fh2 = newSVsv (callback);	1173	grp->sv2 = newSVsv (callback);
		1174	grp->feed = aio_grp_feed;
1399		1175
1400	if (grp->fd2 <= 0)	1176	if (grp->int2 <= 0)
1401	grp->fd2 = 2;	1177	grp->int2 = 2;
1402		1178
1403	aio_grp_feed (grp);	1179	eio_grp_limit (grp, grp->int2);
1404	}	1180	}
1405		1181

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