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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.45 by root, Sun Oct 22 00:19:05 2006 UTC vs.
Revision 1.138 by root, Tue Apr 21 20:06:05 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_SLEEP,
61	REQ_GROUP,
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 *grp, *grp_prev, *grp_next;
70
71	struct aio_cb *volatile next;
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 cancelled;
89	} aio_cb;
90		109
		110	#define EIO_NO_WRAPPERS 1
		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)
		118
		119	enum {
		120	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
		121	};
		122
		123	#include "libeio/eio.c"
		124
91	typedef aio_cb *aio_req;	125	typedef eio_req *aio_req;
92	typedef aio_cb *aio_req_ornot;	126	typedef eio_req *aio_req_ornot;
93	typedef aio_cb *aio_group;
94		127
95	static int started, wanted;	128	static SV *on_next_submit;
96	static volatile int nreqs;	129	static int next_pri = EIO_PRI_DEFAULT;
97	static int max_outstanding = 1<<30;	130	static int max_outstanding;
98	static int respipe [2];
99		131
100	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	132	static int respipe_osf [2], respipe [2] = { -1, -1 };
101	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
102	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
103		133
104	static volatile aio_req reqs, reqe; /* queue start, queue end */	134	static void req_destroy (aio_req req);
105	static volatile aio_req ress, rese; /* queue start, queue end */
106
107	static void req_free (aio_req req);	135	static void req_cancel (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	}
108		150
109	/* must be called at most once */	151	/* must be called at most once */
110	static SV *req_sv (aio_req req, const char *klass)	152	static SV *req_sv (aio_req req, const char *klass)
111	{	153	{
		154	if (!req->self)
		155	{
112	req->self = (SV *)newHV ();	156	req->self = (SV *)newHV ();
113	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	157	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		158	}
114		159
115	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	160	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
116	}	161	}
117		162
118	static aio_req SvAIO_REQ (SV *sv)	163	static aio_req SvAIO_REQ (SV *sv)
119	{	164	{
		165	MAGIC *mg;
		166
120	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	167	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
121	croak ("object of class " AIO_REQ_KLASS " expected");	168	croak ("object of class " AIO_REQ_KLASS " expected");
122		169
123	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	170	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
124		171
125	return mg ? (aio_req)mg->mg_ptr : 0;	172	return mg ? (aio_req)mg->mg_ptr : 0;
126	}	173	}
127		174
128	static void poll_wait ()	175	static void aio_grp_feed (aio_req grp)
129	{	176	{
130	if (nreqs && !ress)	177	if (grp->sv2 && SvOK (grp->sv2))
131	{	178	{
132	fd_set rfd;	179	dSP;
133	FD_ZERO(&rfd);
134	FD_SET(respipe [0], &rfd);
135		180
136	select (respipe [0] + 1, &rfd, 0, 0, 0);	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;
137	}	190	}
138	}	191	}
139		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
140	static void req_invoke (aio_req req)	210	static int req_invoke (eio_req *req)
141	{	211	{
142	dSP;	212	dSP;
143	int errorno = errno;
144		213
145	if (req->cancelled || !SvOK (req->callback))	214	if (req->flags & FLAG_SV2_RO_OFF)
146	return;	215	SvREADONLY_off (req->sv2);
147		216
148	errno = req->errorno;	217	if (!EIO_CANCELLED (req) && req->callback)
149
150	ENTER;
151	PUSHMARK (SP);
152
153	switch (req->type)
154	{	218	{
155	case REQ_READDIR:	219	ENTER;
		220	SAVETMPS;
		221	PUSHMARK (SP);
		222	EXTEND (SP, 1);
		223
		224	switch (req->type)
156	{	225	{
157	SV *rv = &PL_sv_undef;	226	case EIO_READDIR:
158
159	if (req->result >= 0)
160	{	227	{
161	char *buf = req->data2ptr;	228	SV *rv = &PL_sv_undef;
162	AV *av = newAV ();
163		229
164	while (req->result)	230	if (req->result >= 0)
165	{	231	{
		232	int i;
		233	char *buf = req->ptr2;
		234	AV *av = newAV ();
		235
		236	av_extend (av, req->result - 1);
		237
		238	for (i = 0; i < req->result; ++i)
		239	{
166	SV *sv = newSVpv (buf, 0);	240	SV *sv = newSVpv (buf, 0);
167		241
168	av_push (av, sv);	242	av_store (av, i, sv);
169	buf += SvCUR (sv) + 1;	243	buf += SvCUR (sv) + 1;
170	req->result--;	244	}
		245
		246	rv = sv_2mortal (newRV_noinc ((SV *)av));
171	}	247	}
172		248
173	rv = sv_2mortal (newRV_noinc ((SV *)av));	249	PUSHs (rv);
174	}	250	}
		251	break;
175		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
176	XPUSHs (rv);	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;
177	}	334	}
178	break;
179		335
180	case REQ_OPEN:	336	errno = req->errorno;
181	{
182	/* convert fd to fh */
183	SV *fh;
184		337
185	XPUSHs (sv_2mortal (newSViv (req->result)));
186	PUTBACK;	338	PUTBACK;
187	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	339	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
188	SPAGAIN;	340	SPAGAIN;
189		341
190	fh = SvREFCNT_inc (POPs);	342	FREETMPS;
		343	LEAVE;
191		344
192	PUSHMARK (SP);	345	PUTBACK;
193	XPUSHs (sv_2mortal (fh));
194	}
195	break;
196
197	case REQ_SLEEP:
198	case REQ_GROUP:
199	break;
200
201	default:
202	XPUSHs (sv_2mortal (newSViv (req->result)));
203	break;
204	}	346	}
205		347
206		348	return !!SvTRUE (ERRSV);
207	PUTBACK;
208	call_sv (req->callback, G_VOID | G_EVAL);
209	SPAGAIN;
210
211	if (SvTRUE (ERRSV))
212	{
213	req_free (req);
214	croak (0);
215	}
216
217	LEAVE;
218
219	errno = errorno;
220	}	349	}
221		350
222	static void req_free (aio_req req)	351	static void req_destroy (aio_req req)
223	{	352	{
224	if (req->grp)
225	{
226	aio_req grp = req->grp;
227
228	/* unlink request */
229	req->grp_next->grp_prev = req->grp_prev;
230	req->grp_prev->grp_next = req->grp_next;
231
232	if (grp->grp_next == grp)
233	{
234	req_invoke (grp);
235	req_free (grp);
236	}
237	}
238
239	if (req->self)	353	if (req->self)
240	{	354	{
241	sv_unmagic (req->self, PERL_MAGIC_ext);	355	sv_unmagic (req->self, PERL_MAGIC_ext);
242	SvREFCNT_dec (req->self);	356	SvREFCNT_dec (req->self);
243	}	357	}
244		358
245	if (req->data)
246	SvREFCNT_dec (req->data);
247
248	if (req->fh)
249	SvREFCNT_dec (req->fh);	359	SvREFCNT_dec (req->sv1);
250
251	if (req->fh2)
252	SvREFCNT_dec (req->fh2);	360	SvREFCNT_dec (req->sv2);
253
254	if (req->statdata)
255	Safefree (req->statdata);
256
257	if (req->callback)
258	SvREFCNT_dec (req->callback);	361	SvREFCNT_dec (req->callback);
259
260	if (req->type == REQ_READDIR && req->result >= 0)
261	free (req->data2ptr);
262		362
263	Safefree (req);	363	Safefree (req);
264	}	364	}
265		365
266	static void req_cancel (aio_req req)	366	static void req_cancel_subs (aio_req grp)
267	{	367	{
268	req->cancelled = 1;	368	aio_req sub;
269		369
270	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)
271	{	401	{
272	aio_req sub;	402	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
		403	croak ("unable to initialize result pipe(2)");
273		404
274	for (sub = req->grp_next; sub != req; sub = sub->grp_next)	405	respipe_close (respipe [0]);
275	req_cancel (sub);	406	respipe [0] = old_readfd;
276	}	407	}
277	}
278		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
279	static int poll_cb ()	447	static int poll_cb (void)
280	{	448	{
281	dSP;
282	int count = 0;
283	int do_croak = 0;
284	aio_req req;
285
286	for (;;)	449	for (;;)
287	{	450	{
288	pthread_mutex_lock (&reslock);	451	int res = eio_poll ();
289	req = ress;
290		452
291	if (req)	453	if (res > 0)
292	{
293	ress = req->next;
294
295	if (!ress)
296	{
297	/* read any signals sent by the worker threads */
298	char buf [32];
299	while (read (respipe [0], buf, 32) == 32)
300	;
301
302	rese = 0;
303	}
304	}
305
306	pthread_mutex_unlock (&reslock);
307
308	if (!req)
309	break;	454	croak (0);
310		455
311	nreqs--;	456	if (!max_outstanding || max_outstanding > eio_nreqs ())
		457	return res;
312		458
313	if (req->type == REQ_QUIT)	459	poll_wait ();
314	started--;
315	else if (req->type == REQ_GROUP && req->grp_next != req)
316	continue;
317	else
318	{
319	if (req->type == REQ_READ)
320	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
321
322	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
323	SvREADONLY_off (req->data);
324
325	if (req->statdata)
326	{
327	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
328	PL_laststatval = req->result;
329	PL_statcache = *(req->statdata);
330	}
331
332	req_invoke (req);
333
334	count++;
335	}
336
337	req_free (req);
338	}	460	}
339
340	return count;
341	}	461	}
342		462
343	static void *aio_proc(void *arg);
344
345	static void start_thread (void)	463	static void atfork_child (void)
346	{	464	{
347	sigset_t fullsigset, oldsigset;	465	create_respipe ();
348	pthread_t tid;
349	pthread_attr_t attr;
350
351	pthread_attr_init (&attr);
352	pthread_attr_setstacksize (&attr, STACKSIZE);
353	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
354
355	sigfillset (&fullsigset);
356	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
357
358	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
359	started++;
360
361	sigprocmask (SIG_SETMASK, &oldsigset, 0);
362	}	466	}
363		467
364	static void req_send (aio_req req)	468	static SV *
		469	get_cb (SV *cb_sv)
365	{	470	{
366	while (started < wanted && nreqs >= started)	471	HV *st;
367	start_thread ();	472	GV *gvp;
		473	CV *cv;
368		474
369	nreqs++;	475	if (!SvOK (cb_sv))
370
371	pthread_mutex_lock (&reqlock);
372
373	req->next = 0;
374
375	if (reqe)
376	{
377	reqe->next = req;
378	reqe = req;
379	}
380	else
381	reqe = reqs = req;
382
383	pthread_cond_signal (&reqwait);
384	pthread_mutex_unlock (&reqlock);
385
386	if (nreqs > max_outstanding)
387	for (;;)
388	{
389	poll_cb ();
390
391	if (nreqs <= max_outstanding)
392	break;
393
394	poll_wait ();
395	}
396	}
397
398	static void end_thread (void)
399	{
400	aio_req req;
401	Newz (0, req, 1, aio_cb);
402	req->type = REQ_QUIT;
403
404	req_send (req);
405	}
406
407	static void min_parallel (int nthreads)
408	{
409	if (wanted < nthreads)
410	wanted = nthreads;
411	}
412
413	static void max_parallel (int nthreads)
414	{
415	int cur = started;
416
417	if (wanted > nthreads)
418	wanted = nthreads;
419
420	while (cur > wanted)
421	{
422	end_thread ();
423	cur--;
424	}
425
426	while (started > wanted)
427	{
428	poll_wait ();
429	poll_cb ();
430	}
431	}
432
433	static void create_pipe ()
434	{
435	if (pipe (respipe))
436	croak ("unable to initialize result pipe");
437
438	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
439	croak ("cannot set result pipe to nonblocking mode");
440
441	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
442	croak ("cannot set result pipe to nonblocking mode");
443	}
444
445	/*****************************************************************************/
446	/* work around various missing functions */
447
448	#if !HAVE_PREADWRITE
449	# define pread aio_pread
450	# define pwrite aio_pwrite
451
452	/*
453	* make our pread/pwrite safe against themselves, but not against
454	* normal read/write by using a mutex. slows down execution a lot,
455	* but that's your problem, not mine.
456	*/
457	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
458
459	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
460	{
461	ssize_t res;
462	off_t ooffset;
463
464	pthread_mutex_lock (&preadwritelock);
465	ooffset = lseek (fd, 0, SEEK_CUR);
466	lseek (fd, offset, SEEK_SET);
467	res = read (fd, buf, count);
468	lseek (fd, ooffset, SEEK_SET);
469	pthread_mutex_unlock (&preadwritelock);
470
471	return res;
472	}
473
474	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
475	{
476	ssize_t res;
477	off_t ooffset;
478
479	pthread_mutex_lock (&preadwritelock);
480	ooffset = lseek (fd, 0, SEEK_CUR);
481	lseek (fd, offset, SEEK_SET);
482	res = write (fd, buf, count);
483	lseek (fd, offset, SEEK_SET);
484	pthread_mutex_unlock (&preadwritelock);
485
486	return res;
487	}
488	#endif
489
490	#if !HAVE_FDATASYNC
491	# define fdatasync fsync
492	#endif
493
494	#if !HAVE_READAHEAD
495	# define readahead aio_readahead
496
497	static ssize_t readahead (int fd, off_t offset, size_t count)
498	{
499	char readahead_buf[4096];
500
501	while (count > 0)
502	{
503	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
504
505	pread (fd, readahead_buf, len, offset);
506	offset += len;
507	count -= len;
508	}
509
510	errno = 0;
511	}
512	#endif
513
514	#if !HAVE_READDIR_R
515	# define readdir_r aio_readdir_r
516
517	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
518
519	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
520	{
521	struct dirent *e;
522	int errorno;
523
524	pthread_mutex_lock (&readdirlock);
525
526	e = readdir (dirp);
527	errorno = errno;
528
529	if (e)
530	{
531	*res = ent;
532	strcpy (ent->d_name, e->d_name);
533	}
534	else
535	*res = 0;
536
537	pthread_mutex_unlock (&readdirlock);
538
539	errno = errorno;
540	return e ? 0 : -1;
541	}
542	#endif
543
544	/* sendfile always needs emulation */
545	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
546	{
547	ssize_t res;
548
549	if (!count)
550	return 0;	476	return 0;
551		477
552	#if HAVE_SENDFILE	478	cv = sv_2cv (cb_sv, &st, &gvp, 0);
553	# if __linux
554	res = sendfile (ofd, ifd, &offset, count);
555		479
556	# elif __freebsd	480	if (!cv)
557	/*	481	croak ("IO::AIO callback must be undef or a CODE reference");
558	* Of course, the freebsd sendfile is a dire hack with no thoughts
559	* wasted on making it similar to other I/O functions.
560	*/
561	{
562	off_t sbytes;
563	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
564		482
565	if (res < 0 && sbytes)	483	return (SV *)cv;
566	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
567	res = sbytes;
568	}
569
570	# elif __hpux
571	res = sendfile (ofd, ifd, offset, count, 0, 0);
572
573	# elif __solaris
574	{
575	struct sendfilevec vec;
576	size_t sbytes;
577
578	vec.sfv_fd = ifd;
579	vec.sfv_flag = 0;
580	vec.sfv_off = offset;
581	vec.sfv_len = count;
582
583	res = sendfilev (ofd, &vec, 1, &sbytes);
584
585	if (res < 0 && sbytes)
586	res = sbytes;
587	}
588
589	# endif
590	#else
591	res = -1;
592	errno = ENOSYS;
593	#endif
594
595	if (res < 0
596	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
597	#if __solaris
598	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
599	#endif
600	)
601	)
602	{
603	/* emulate sendfile. this is a major pain in the ass */
604	char buf[4096];
605	res = 0;
606
607	while (count)
608	{
609	ssize_t cnt;
610
611	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
612
613	if (cnt <= 0)
614	{
615	if (cnt && !res) res = -1;
616	break;
617	}
618
619	cnt = write (ofd, buf, cnt);
620
621	if (cnt <= 0)
622	{
623	if (cnt && !res) res = -1;
624	break;
625	}
626
627	offset += cnt;
628	res += cnt;
629	count -= cnt;
630	}
631	}
632
633	return res;
634	}
635
636	/* read a full directory */
637	static int scandir_ (const char *path, void **namesp)
638	{
639	DIR *dirp = opendir (path);
640	union
641	{
642	struct dirent d;
643	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
644	} u;
645	struct dirent *entp;
646	char *name, *names;
647	int memlen = 4096;
648	int memofs = 0;
649	int res = 0;
650	int errorno;
651
652	if (!dirp)
653	return -1;
654
655	names = malloc (memlen);
656
657	for (;;)
658	{
659	errno = 0, readdir_r (dirp, &u.d, &entp);
660
661	if (!entp)
662	break;
663
664	name = entp->d_name;
665
666	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
667	{
668	int len = strlen (name) + 1;
669
670	res++;
671
672	while (memofs + len > memlen)
673	{
674	memlen *= 2;
675	names = realloc (names, memlen);
676	if (!names)
677	break;
678	}
679
680	memcpy (names + memofs, name, len);
681	memofs += len;
682	}
683	}
684
685	errorno = errno;
686	closedir (dirp);
687
688	if (errorno)
689	{
690	free (names);
691	errno = errorno;
692	res = -1;
693	}
694
695	*namesp = (void *)names;
696	return res;
697	}
698
699	/*****************************************************************************/
700
701	static void *aio_proc (void *thr_arg)
702	{
703	aio_req req;
704	int type;
705
706	do
707	{
708	pthread_mutex_lock (&reqlock);
709
710	for (;;)
711	{
712	req = reqs;
713
714	if (reqs)
715	{
716	reqs = reqs->next;
717	if (!reqs) reqe = 0;
718	}
719
720	if (req)
721	break;
722
723	pthread_cond_wait (&reqwait, &reqlock);
724	}
725
726	pthread_mutex_unlock (&reqlock);
727
728	errno = 0; /* strictly unnecessary */
729
730	if (!req->cancelled)
731	switch (req->type)
732	{
733	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
734	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
735
736	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
737	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
738
739	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
740	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
741	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
742
743	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
744	case REQ_CLOSE: req->result = close (req->fd); break;
745	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
746	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
747	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
748	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
749	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
750
751	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
752	case REQ_FSYNC: req->result = fsync (req->fd); break;
753	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
754
755	case REQ_SLEEP:
756	{
757	struct timeval tv;
758
759	tv.tv_sec = req->fd;
760	tv.tv_usec = req->fd2;
761
762	req->result = select (0, 0, 0, 0, &tv);
763	}
764
765	case REQ_QUIT:
766	break;
767
768	default:
769	req->result = ENOSYS;
770	break;
771	}
772
773	req->errorno = errno;
774
775	pthread_mutex_lock (&reslock);
776
777	req->next = 0;
778
779	if (rese)
780	{
781	rese->next = req;
782	rese = req;
783	}
784	else
785	{
786	rese = ress = req;
787
788	/* write a dummy byte to the pipe so fh becomes ready */
789	write (respipe [1], &respipe, 1);
790	}
791
792	pthread_mutex_unlock (&reslock);
793	}
794	while (type != REQ_QUIT);
795
796	return 0;
797	}
798
799	/*****************************************************************************/
800
801	static void atfork_prepare (void)
802	{
803	pthread_mutex_lock (&reqlock);
804	pthread_mutex_lock (&reslock);
805	#if !HAVE_PREADWRITE
806	pthread_mutex_lock (&preadwritelock);
807	#endif
808	#if !HAVE_READDIR_R
809	pthread_mutex_lock (&readdirlock);
810	#endif
811	}
812
813	static void atfork_parent (void)
814	{
815	#if !HAVE_READDIR_R
816	pthread_mutex_unlock (&readdirlock);
817	#endif
818	#if !HAVE_PREADWRITE
819	pthread_mutex_unlock (&preadwritelock);
820	#endif
821	pthread_mutex_unlock (&reslock);
822	pthread_mutex_unlock (&reqlock);
823	}
824
825	static void atfork_child (void)
826	{
827	aio_req prv;
828
829	started = 0;
830
831	while (reqs)
832	{
833	prv = reqs;
834	reqs = prv->next;
835	req_free (prv);
836	}
837
838	reqs = reqe = 0;
839
840	while (ress)
841	{
842	prv = ress;
843	ress = prv->next;
844	req_free (prv);
845	}
846
847	ress = rese = 0;
848
849	close (respipe [0]);
850	close (respipe [1]);
851	create_pipe ();
852
853	atfork_parent ();
854	}	484	}
855		485
856	#define dREQ \	486	#define dREQ \
		487	SV *cb_cv; \
857	aio_req req; \	488	aio_req req; \
		489	int req_pri = next_pri; \
		490	next_pri = EIO_PRI_DEFAULT; \
858	\	491	\
859	if (SvOK (callback) && !SvROK (callback)) \	492	cb_cv = get_cb (callback); \
860	croak ("callback must be undef or of reference type"); \
861	\	493	\
862	Newz (0, req, 1, aio_cb); \	494	Newz (0, req, 1, eio_req); \
863	if (!req) \	495	if (!req) \
864	croak ("out of memory during aio_req allocation"); \	496	croak ("out of memory during eio_req allocation"); \
865	\	497	\
866	req->callback = newSVsv (callback)	498	req->callback = SvREFCNT_inc (cb_cv); \
		499	req->pri = req_pri
867		500
868	#define REQ_SEND \	501	#define REQ_SEND \
		502	PUTBACK; \
869	req_send (req); \	503	req_submit (req); \
		504	SPAGAIN; \
870	\	505	\
871	if (GIMME_V != G_VOID) \	506	if (GIMME_V != G_VOID) \
872	XPUSHs (req_sv (req, AIO_REQ_KLASS));	507	XPUSHs (req_sv (req, AIO_REQ_KLASS));
873		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
874	MODULE = IO::AIO PACKAGE = IO::AIO	520	MODULE = IO::AIO PACKAGE = IO::AIO
875		521
876	PROTOTYPES: ENABLE	522	PROTOTYPES: ENABLE
877		523
878	BOOT:	524	BOOT:
879	{	525	{
880	HV *stash = gv_stashpv ("IO::AIO", 1);	526	stash = gv_stashpv ("IO::AIO", 1);
		527
881	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	528	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
882	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	529	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
883	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));
884		540
885	create_pipe ();	541	create_respipe ();
886	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
887	}
888		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
889	void	550	void
890	min_parallel (nthreads)	551	max_poll_reqs (int nreqs)
891	int nthreads
892	PROTOTYPE: $	552	PROTOTYPE: $
		553	CODE:
		554	eio_set_max_poll_reqs (nreqs);
893		555
894	void	556	void
895	max_parallel (nthreads)	557	max_poll_time (double nseconds)
896	int nthreads
897	PROTOTYPE: $	558	PROTOTYPE: $
898
899	int
900	max_outstanding (nreqs)
901	int nreqs
902	PROTOTYPE: $
903	CODE:	559	CODE:
904	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:
905	max_outstanding = nreqs;	584	max_outstanding = maxreqs;
906		585
907	void	586	void
908	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	587	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
909	SV * pathname
910	int flags
911	int mode
912	SV * callback
913	PROTOTYPE: $$$;$	588	PROTOTYPE: $$$;$
914	PPCODE:	589	PPCODE:
915	{	590	{
916	dREQ;	591	dREQ;
917		592
918	req->type = REQ_OPEN;	593	req->type = EIO_OPEN;
919	req->data = newSVsv (pathname);	594	req->sv1 = newSVsv (pathname);
920	req->dataptr = SvPVbyte_nolen (req->data);	595	req->ptr1 = SvPVbyte_nolen (req->sv1);
921	req->fd = flags;	596	req->int1 = flags;
922	req->mode = mode;	597	req->int2 = mode;
923		598
924	REQ_SEND;	599	REQ_SEND;
925	}	600	}
926		601
927	void	602	void
928	aio_close (fh,callback=&PL_sv_undef)	603	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
929	SV * fh
930	SV * callback
931	PROTOTYPE: $;$	604	PROTOTYPE: $;$
932	ALIAS:	605	ALIAS:
933	aio_close = REQ_CLOSE
934	aio_fsync = REQ_FSYNC	606	aio_fsync = EIO_FSYNC
935	aio_fdatasync = REQ_FDATASYNC	607	aio_fdatasync = EIO_FDATASYNC
936	PPCODE:	608	PPCODE:
937	{	609	{
		610	int fd = extract_fd (fh, 0);
938	dREQ;	611	dREQ;
939		612
940	req->type = ix;	613	req->type = ix;
941	req->fh = newSVsv (fh);	614	req->sv1 = newSVsv (fh);
942	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	615	req->int1 = fd;
943		616
944	REQ_SEND (req);	617	REQ_SEND (req);
945	}	618	}
946		619
947	void	620	void
		621	aio_sync_file_range (SV *fh, SV *offset, SV *nbytes, IV flags, SV *callback=&PL_sv_undef)
		622	PROTOTYPE: $$$$;$
		623	PPCODE:
		624	{
		625	int fd = extract_fd (fh, 0);
		626	dREQ;
		627
		628	req->type = EIO_SYNC_FILE_RANGE;
		629	req->sv1 = newSVsv (fh);
		630	req->int1 = fd;
		631	req->offs = SvVAL64 (offset);
		632	req->size = SvVAL64 (nbytes);
		633	req->int2 = flags;
		634
		635	REQ_SEND (req);
		636	}
		637
		638	void
		639	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		640	PROTOTYPE: $;$
		641	PPCODE:
		642	{
		643	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		644	int fd = extract_fd (fh, 0);
		645	dREQ;
		646
		647	if (close_pipe < 0)
		648	{
		649	int pipefd [2];
		650
		651	if (pipe (pipefd) < 0
		652	|| close (pipefd [1]) < 0
		653	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		654	abort (); /*D*/
		655
		656	close_pipe = pipefd [0];
		657	}
		658
		659	req->type = EIO_DUP2;
		660	req->int1 = close_pipe;
		661	req->sv2 = newSVsv (fh);
		662	req->int2 = fd;
		663
		664	REQ_SEND (req);
		665	}
		666
		667	void
948	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	668	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
949	SV * fh
950	UV offset
951	UV length
952	SV * data
953	UV dataoffset
954	SV * callback
955	ALIAS:	669	ALIAS:
956	aio_read = REQ_READ	670	aio_read = EIO_READ
957	aio_write = REQ_WRITE	671	aio_write = EIO_WRITE
958	PROTOTYPE: $$$$$;$	672	PROTOTYPE: $$$$$;$
959	PPCODE:	673	PPCODE:
960	{	674	{
961	aio_req req;
962	STRLEN svlen;	675	STRLEN svlen;
		676	int fd = extract_fd (fh, ix == EIO_WRITE);
963	char *svptr = SvPVbyte (data, svlen);	677	char *svptr = SvPVbyte (data, svlen);
964		678	UV len = SvUV (length);
965	SvUPGRADE (data, SVt_PV);
966	SvPOK_on (data);
967		679
968	if (dataoffset < 0)	680	if (dataoffset < 0)
969	dataoffset += svlen;	681	dataoffset += svlen;
970		682
971	if (dataoffset < 0 || dataoffset > svlen)	683	if (dataoffset < 0 || dataoffset > svlen)
972	croak ("data offset outside of string");	684	croak ("dataoffset outside of data scalar");
973		685
974	if (ix == REQ_WRITE)	686	if (ix == EIO_WRITE)
975	{	687	{
976	/* write: check length and adjust. */	688	/* write: check length and adjust. */
977	if (length < 0 || length + dataoffset > svlen)	689	if (!SvOK (length) || len + dataoffset > svlen)
978	length = svlen - dataoffset;	690	len = svlen - dataoffset;
979	}	691	}
980	else	692	else
981	{	693	{
982	/* read: grow scalar as necessary */	694	/* read: check type and grow scalar as necessary */
		695	SvUPGRADE (data, SVt_PV);
983	svptr = SvGROW (data, length + dataoffset);	696	svptr = SvGROW (data, len + dataoffset + 1);
984	}	697	}
985		698
986	if (length < 0)	699	if (len < 0)
987	croak ("length must not be negative");	700	croak ("length must not be negative");
988		701
989	{	702	{
990	dREQ;	703	dREQ;
991		704
992	req->type = ix;	705	req->type = ix;
993	req->fh = newSVsv (fh);	706	req->sv1 = newSVsv (fh);
994	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	707	req->int1 = fd;
995	: IoOFP (sv_2io (fh)));	708	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
996	req->offset = offset;	709	req->size = len;
997	req->length = length;
998	req->data = SvREFCNT_inc (data);	710	req->sv2 = SvREFCNT_inc (data);
999	req->dataptr = (char *)svptr + dataoffset;	711	req->ptr2 = (char *)svptr + dataoffset;
		712	req->stroffset = dataoffset;
1000		713
1001	if (!SvREADONLY (data))	714	if (!SvREADONLY (data))
1002	{	715	{
1003	SvREADONLY_on (data);	716	SvREADONLY_on (data);
1004	req->data2ptr = (void *)data;	717	req->flags |= FLAG_SV2_RO_OFF;
1005	}	718	}
1006		719
1007	REQ_SEND;	720	REQ_SEND;
1008	}	721	}
1009	}	722	}
1010		723
1011	void	724	void
		725	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		726	PROTOTYPE: $$;$
		727	PPCODE:
		728	{
		729	SV *data;
		730	dREQ;
		731
		732	req->type = EIO_READLINK;
		733	req->sv1 = newSVsv (path);
		734	req->ptr1 = SvPVbyte_nolen (req->sv1);
		735
		736	REQ_SEND;
		737	}
		738
		739	void
1012	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	740	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
1013	SV * out_fh
1014	SV * in_fh
1015	UV in_offset
1016	UV length
1017	SV * callback
1018	PROTOTYPE: $$$$;$	741	PROTOTYPE: $$$$;$
1019	PPCODE:	742	PPCODE:
1020	{	743	{
		744	int ifd = extract_fd (in_fh , 0);
		745	int ofd = extract_fd (out_fh, 0);
1021	dREQ;	746	dREQ;
1022		747
1023	req->type = REQ_SENDFILE;	748	req->type = EIO_SENDFILE;
1024	req->fh = newSVsv (out_fh);	749	req->sv1 = newSVsv (out_fh);
1025	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	750	req->int1 = ofd;
1026	req->fh2 = newSVsv (in_fh);	751	req->sv2 = newSVsv (in_fh);
1027	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	752	req->int2 = ifd;
1028	req->offset = in_offset;	753	req->offs = SvVAL64 (in_offset);
1029	req->length = length;	754	req->size = length;
1030		755
1031	REQ_SEND;	756	REQ_SEND;
1032	}	757	}
1033		758
1034	void	759	void
1035	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	760	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1036	SV * fh
1037	UV offset
1038	IV length
1039	SV * callback
1040	PROTOTYPE: $$$;$	761	PROTOTYPE: $$$;$
1041	PPCODE:	762	PPCODE:
1042	{	763	{
		764	int fd = extract_fd (fh, 0);
1043	dREQ;	765	dREQ;
1044		766
1045	req->type = REQ_READAHEAD;	767	req->type = EIO_READAHEAD;
1046	req->fh = newSVsv (fh);	768	req->sv1 = newSVsv (fh);
1047	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	769	req->int1 = fd;
1048	req->offset = offset;	770	req->offs = SvVAL64 (offset);
1049	req->length = length;	771	req->size = length;
1050		772
1051	REQ_SEND;	773	REQ_SEND;
1052	}	774	}
1053		775
1054	void	776	void
1055	aio_stat (fh_or_path,callback=&PL_sv_undef)	777	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1056	SV * fh_or_path
1057	SV * callback
1058	ALIAS:	778	ALIAS:
1059	aio_stat = REQ_STAT	779	aio_stat = EIO_STAT
1060	aio_lstat = REQ_LSTAT	780	aio_lstat = EIO_LSTAT
1061	PPCODE:	781	PPCODE:
1062	{	782	{
1063	dREQ;	783	dREQ;
1064		784
1065	New (0, req->statdata, 1, Stat_t);	785	req->sv1 = newSVsv (fh_or_path);
1066	if (!req->statdata)
1067	{
1068	req_free (req);
1069	croak ("out of memory during aio_req->statdata allocation");
1070	}
1071		786
1072	if (SvPOK (fh_or_path))	787	if (SvPOK (req->sv1))
1073	{	788	{
1074	req->type = ix;	789	req->type = ix;
1075	req->data = newSVsv (fh_or_path);
1076	req->dataptr = SvPVbyte_nolen (req->data);	790	req->ptr1 = SvPVbyte_nolen (req->sv1);
1077	}	791	}
1078	else	792	else
1079	{	793	{
1080	req->type = REQ_FSTAT;	794	req->type = EIO_FSTAT;
1081	req->fh = newSVsv (fh_or_path);
1082	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	795	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1083	}	796	}
1084		797
1085	REQ_SEND;	798	REQ_SEND;
1086	}	799	}
1087		800
1088	void	801	void
		802	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		803	PPCODE:
		804	{
		805	dREQ;
		806
		807	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		808	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		809	req->sv1 = newSVsv (fh_or_path);
		810
		811	if (SvPOK (req->sv1))
		812	{
		813	req->type = EIO_UTIME;
		814	req->ptr1 = SvPVbyte_nolen (req->sv1);
		815	}
		816	else
		817	{
		818	req->type = EIO_FUTIME;
		819	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		820	}
		821
		822	REQ_SEND;
		823	}
		824
		825	void
		826	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		827	PPCODE:
		828	{
		829	dREQ;
		830
		831	req->sv1 = newSVsv (fh_or_path);
		832	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		833
		834	if (SvPOK (req->sv1))
		835	{
		836	req->type = EIO_TRUNCATE;
		837	req->ptr1 = SvPVbyte_nolen (req->sv1);
		838	}
		839	else
		840	{
		841	req->type = EIO_FTRUNCATE;
		842	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		843	}
		844
		845	REQ_SEND;
		846	}
		847
		848	void
		849	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		850	ALIAS:
		851	aio_chmod = EIO_CHMOD
		852	aio_mkdir = EIO_MKDIR
		853	PPCODE:
		854	{
		855	dREQ;
		856
		857	req->int2 = mode;
		858	req->sv1 = newSVsv (fh_or_path);
		859
		860	if (SvPOK (req->sv1))
		861	{
		862	req->type = ix;
		863	req->ptr1 = SvPVbyte_nolen (req->sv1);
		864	}
		865	else
		866	{
		867	req->type = EIO_FCHMOD;
		868	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		869	}
		870
		871	REQ_SEND;
		872	}
		873
		874	void
		875	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		876	PPCODE:
		877	{
		878	dREQ;
		879
		880	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		881	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		882	req->sv1 = newSVsv (fh_or_path);
		883
		884	if (SvPOK (req->sv1))
		885	{
		886	req->type = EIO_CHOWN;
		887	req->ptr1 = SvPVbyte_nolen (req->sv1);
		888	}
		889	else
		890	{
		891	req->type = EIO_FCHOWN;
		892	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		893	}
		894
		895	REQ_SEND;
		896	}
		897
		898	void
1089	aio_unlink (pathname,callback=&PL_sv_undef)	899	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1090	SV * pathname
1091	SV * callback
1092	ALIAS:	900	ALIAS:
1093	aio_unlink = REQ_UNLINK	901	aio_unlink = EIO_UNLINK
1094	aio_rmdir = REQ_RMDIR	902	aio_rmdir = EIO_RMDIR
1095	aio_readdir = REQ_READDIR	903	aio_readdir = EIO_READDIR
1096	PPCODE:	904	PPCODE:
1097	{	905	{
1098	dREQ;	906	dREQ;
1099		907
1100	req->type = ix;	908	req->type = ix;
1101	req->data = newSVsv (pathname);	909	req->sv1 = newSVsv (pathname);
1102	req->dataptr = SvPVbyte_nolen (req->data);	910	req->ptr1 = SvPVbyte_nolen (req->sv1);
		911
		912	REQ_SEND;
		913	}
		914
		915	void
		916	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		917	ALIAS:
		918	aio_link = EIO_LINK
		919	aio_symlink = EIO_SYMLINK
		920	aio_rename = EIO_RENAME
		921	PPCODE:
		922	{
		923	dREQ;
		924
		925	req->type = ix;
		926	req->sv1 = newSVsv (oldpath);
		927	req->ptr1 = SvPVbyte_nolen (req->sv1);
		928	req->sv2 = newSVsv (newpath);
		929	req->ptr2 = SvPVbyte_nolen (req->sv2);
1103		930
1104	REQ_SEND;	931	REQ_SEND;
1105	}	932	}
1106		933
1107	void	934	void
1108	aio_link (oldpath,newpath,callback=&PL_sv_undef)	935	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1109	SV * oldpath
1110	SV * newpath
1111	SV * callback
1112	ALIAS:
1113	aio_link = REQ_LINK
1114	aio_symlink = REQ_SYMLINK
1115	aio_rename = REQ_RENAME
1116	PPCODE:	936	PPCODE:
1117	{	937	{
1118	dREQ;	938	dREQ;
1119		939
1120	req->type = ix;	940	req->type = EIO_MKNOD;
1121	req->fh = newSVsv (oldpath);	941	req->sv1 = newSVsv (pathname);
1122	req->data2ptr = SvPVbyte_nolen (req->fh);	942	req->ptr1 = SvPVbyte_nolen (req->sv1);
1123	req->data = newSVsv (newpath);	943	req->int2 = (mode_t)mode;
1124	req->dataptr = SvPVbyte_nolen (req->data);	944	req->offs = dev;
1125		945
1126	REQ_SEND;	946	REQ_SEND;
1127	}	947	}
1128		948
1129	void	949	void
1130	aio_sleep (delay,callback=&PL_sv_undef)	950	aio_busy (double delay, SV *callback=&PL_sv_undef)
1131	double delay
1132	SV * callback
1133	PPCODE:	951	PPCODE:
1134	{	952	{
1135	dREQ;	953	dREQ;
1136		954
1137	req->type = REQ_SLEEP;	955	req->type = EIO_BUSY;
1138	req->fd = delay < 0. ? 0 : delay;	956	req->nv1 = delay < 0. ? 0. : delay;
1139	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1140		957
1141	REQ_SEND;	958	REQ_SEND;
1142	}	959	}
1143		960
1144	void	961	void
1145	aio_group (callback=&PL_sv_undef)	962	aio_group (SV *callback=&PL_sv_undef)
1146	SV * callback
1147	PROTOTYPE: ;&	963	PROTOTYPE: ;$
1148	PPCODE:	964	PPCODE:
1149	{	965	{
1150	dREQ;	966	dREQ;
		967
1151	req->type = REQ_GROUP;	968	req->type = EIO_GROUP;
1152	req->grp_next = req;
1153	req->grp_prev = req;
1154		969
1155	req_send (req);	970	req_submit (req);
1156	XPUSHs (req_sv (req, AIO_GRP_KLASS));	971	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1157	}	972	}
		973
		974	void
		975	aio_nop (SV *callback=&PL_sv_undef)
		976	ALIAS:
		977	aio_nop = EIO_NOP
		978	aio_sync = EIO_SYNC
		979	PPCODE:
		980	{
		981	dREQ;
		982
		983	req->type = ix;
		984
		985	REQ_SEND;
		986	}
		987
		988	int
		989	aioreq_pri (int pri = 0)
		990	PROTOTYPE: ;$
		991	CODE:
		992	RETVAL = next_pri;
		993	if (items > 0)
		994	{
		995	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		996	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		997	next_pri = pri;
		998	}
		999	OUTPUT:
		1000	RETVAL
		1001
		1002	void
		1003	aioreq_nice (int nice = 0)
		1004	CODE:
		1005	nice = next_pri - nice;
		1006	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1007	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1008	next_pri = nice;
1158		1009
1159	void	1010	void
1160	flush ()	1011	flush ()
1161	PROTOTYPE:	1012	PROTOTYPE:
1162	CODE:	1013	CODE:
1163	while (nreqs)	1014	while (eio_nreqs ())
1164	{	1015	{
1165	poll_wait ();	1016	poll_wait ();
1166	poll_cb ();	1017	poll_cb ();
1167	}	1018	}
1168		1019
1169	void	1020	int
1170	poll()	1021	poll()
1171	PROTOTYPE:	1022	PROTOTYPE:
1172	CODE:	1023	CODE:
1173	if (nreqs)
1174	{
1175	poll_wait ();	1024	poll_wait ();
1176	poll_cb ();	1025	RETVAL = poll_cb ();
1177	}	1026	OUTPUT:
		1027	RETVAL
1178		1028
1179	int	1029	int
1180	poll_fileno()	1030	poll_fileno()
1181	PROTOTYPE:	1031	PROTOTYPE:
1182	CODE:	1032	CODE:
…		…
1194		1044
1195	void	1045	void
1196	poll_wait()	1046	poll_wait()
1197	PROTOTYPE:	1047	PROTOTYPE:
1198	CODE:	1048	CODE:
1199	if (nreqs)
1200	poll_wait ();	1049	poll_wait ();
1201		1050
1202	int	1051	int
1203	nreqs()	1052	nreqs()
1204	PROTOTYPE:	1053	PROTOTYPE:
1205	CODE:	1054	CODE:
1206	RETVAL = nreqs;	1055	RETVAL = eio_nreqs ();
1207	OUTPUT:	1056	OUTPUT:
1208	RETVAL	1057	RETVAL
1209		1058
		1059	int
		1060	nready()
		1061	PROTOTYPE:
		1062	CODE:
		1063	RETVAL = eio_nready ();
		1064	OUTPUT:
		1065	RETVAL
		1066
		1067	int
		1068	npending()
		1069	PROTOTYPE:
		1070	CODE:
		1071	RETVAL = eio_npending ();
		1072	OUTPUT:
		1073	RETVAL
		1074
		1075	int
		1076	nthreads()
		1077	PROTOTYPE:
		1078	CODE:
		1079	RETVAL = eio_nthreads ();
		1080	OUTPUT:
		1081	RETVAL
		1082
		1083	void _on_next_submit (SV *cb)
		1084	CODE:
		1085	SvREFCNT_dec (on_next_submit);
		1086	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1087
		1088	PROTOTYPES: DISABLE
		1089
1210	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1090	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1211		1091
1212	void	1092	void
1213	cancel (aio_req_ornot req)	1093	cancel (aio_req_ornot req)
1214	PROTOTYPE:
1215	CODE:	1094	CODE:
1216	req_cancel (req);	1095	eio_cancel (req);
		1096
		1097	void
		1098	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1099	PPCODE:
		1100	{
		1101	if (GIMME_V != G_VOID)
		1102	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1103
		1104	if (items > 1)
		1105	{
		1106	SV *cb_cv = get_cb (callback);
		1107
		1108	SvREFCNT_dec (req->callback);
		1109	req->callback = SvREFCNT_inc (cb_cv);
		1110	}
		1111	}
1217		1112
1218	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1113	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1219		1114
1220	void	1115	void
1221	add (aio_req grp, ...)	1116	add (aio_req grp, ...)
1222	PROTOTYPE: $;@
1223	PPCODE:	1117	PPCODE:
1224	{	1118	{
1225	int i;	1119	int i;
1226		1120
		1121	if (grp->int1 == 2)
		1122	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1123
1227	for (i = 1; i < items; ++i )	1124	for (i = 1; i < items; ++i )
1228	{	1125	{
1229	aio_req req = SvAIO_REQ (ST (i));	1126	aio_req req;
1230
1231	req->grp_prev = grp;
1232	req->grp_next = grp->grp_next;
1233	grp->grp_next->grp_prev = req;
1234	grp->grp_next = req;
1235
1236	req->grp = grp;
1237		1127
1238	if (GIMME_V != G_VOID)	1128	if (GIMME_V != G_VOID)
1239	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1129	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1240	}
1241	}
1242		1130
		1131	req = SvAIO_REQ (ST (i));
		1132
		1133	if (req)
		1134	eio_grp_add (grp, req);
		1135	}
		1136	}
		1137
		1138	void
		1139	cancel_subs (aio_req_ornot req)
		1140	CODE:
		1141	req_cancel_subs (req);
		1142
		1143	void
		1144	result (aio_req grp, ...)
		1145	CODE:
		1146	{
		1147	int i;
		1148	AV *av;
		1149
		1150	grp->errorno = errno;
		1151
		1152	av = newAV ();
		1153
		1154	for (i = 1; i < items; ++i )
		1155	av_push (av, newSVsv (ST (i)));
		1156
		1157	SvREFCNT_dec (grp->sv1);
		1158	grp->sv1 = (SV *)av;
		1159	}
		1160
		1161	void
		1162	errno (aio_req grp, int errorno = errno)
		1163	CODE:
		1164	grp->errorno = errorno;
		1165
		1166	void
		1167	limit (aio_req grp, int limit)
		1168	CODE:
		1169	eio_grp_limit (grp, limit);
		1170
		1171	void
		1172	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1173	CODE:
		1174	{
		1175	SvREFCNT_dec (grp->sv2);
		1176	grp->sv2 = newSVsv (callback);
		1177	grp->feed = aio_grp_feed;
		1178
		1179	if (grp->int2 <= 0)
		1180	grp->int2 = 2;
		1181
		1182	eio_grp_limit (grp, grp->int2);
		1183	}
		1184

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