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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.36 by root, Tue Aug 23 01:18:04 2005 UTC vs.
Revision 1.140 by root, Wed Jun 3 12:24:49 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>	9	#include <stddef.h>
11		10	#include <stdlib.h>
		11	#include <errno.h>
12	#include <sys/types.h>	12	#include <sys/types.h>
13	#include <sys/stat.h>	13	#include <sys/stat.h>
14
15	#include <unistd.h>	14	#include <limits.h>
16	#include <fcntl.h>	15	#include <fcntl.h>
17	#include <signal.h>
18	#include <sched.h>	16	#include <sched.h>
19		17
20	#if HAVE_SENDFILE	18	/* perl namespace pollution */
21	# if __linux	19	#undef VERSION
22	# include <sys/sendfile.h>	20
23	# elif __freebsd	21	#ifdef _WIN32
24	# include <sys/socket.h>	22
25	# include <sys/uio.h>	23	# define EIO_STRUCT_DIRENT Direntry_t
26	# elif __hpux	24	# undef malloc
27	# include <sys/socket.h>	25	# undef free
28	# elif __solaris /* not yet */	26
29	# 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
30	# else	59	#else
31	# error sendfile support requested but not available	60
32	# 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
33	#endif	68	#endif
34		69
35	#if __ia64	70	/* perl stupidly overrides readdir and maybe others */
36	# define STACKSIZE 65536	71	/* with thread-unsafe versions, imagine that :( */
		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
37	#else	81	#else
38	# define STACKSIZE 4096	82	# define SvVAL64 SvNV
39	#endif	83	#endif
40		84
		85	/*****************************************************************************/
		86
		87	#if __GNUC__ >= 3
		88	# define expect(expr,value) __builtin_expect ((expr),(value))
		89	#else
		90	# define expect(expr,value) (expr)
		91	#endif
		92
		93	#define expect_false(expr) expect ((expr) != 0, 0)
		94	#define expect_true(expr) expect ((expr) != 0, 1)
		95
		96	/*****************************************************************************/
		97
		98	static HV *stash;
		99	typedef SV SV8; /* byte-sv, used for argument-checking */
		100
		101	#define AIO_REQ_KLASS "IO::AIO::REQ"
		102	#define AIO_GRP_KLASS "IO::AIO::GRP"
		103
		104	#define EIO_REQ_MEMBERS \
		105	SV *callback; \
		106	SV *sv1, *sv2; \
		107	STRLEN stroffset; \
		108	SV *self;
		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
41	enum {	119	enum {
42	REQ_QUIT,	120	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
43	REQ_OPEN, REQ_CLOSE,
44	REQ_READ, REQ_WRITE, REQ_READAHEAD,
45	REQ_SENDFILE,
46	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
47	REQ_FSYNC, REQ_FDATASYNC,
48	REQ_UNLINK, REQ_RMDIR,
49	REQ_SYMLINK,
50	};	121	};
51		122
52	typedef struct aio_cb {	123	#include "libeio/eio.c"
53	struct aio_cb *volatile next;
54		124
55	int type;
56
57	int fd, fd2;
58	off_t offset;
59	size_t length;
60	ssize_t result;
61	mode_t mode; /* open */
62	int errorno;
63	SV *data, *callback;
64	SV *fh, *fh2;
65	void *dataptr, *data2ptr;
66	STRLEN dataoffset;
67
68	Stat_t *statdata;
69	} aio_cb;
70
71	typedef aio_cb *aio_req;	125	typedef eio_req *aio_req;
		126	typedef eio_req *aio_req_ornot;
72		127
73	static int started, wanted;	128	static SV *on_next_submit;
74	static volatile int nreqs;	129	static int next_pri = EIO_PRI_DEFAULT;
75	static int max_outstanding = 1<<30;	130	static int max_outstanding;
76	static int respipe [2];
77		131
78	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	132	static int respipe_osf [2], respipe [2] = { -1, -1 };
79	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
80	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
81		133
82	static volatile aio_req reqs, reqe; /* queue start, queue end */	134	static void req_destroy (aio_req req);
83	static volatile aio_req ress, rese; /* queue start, queue end */
84
85	static void free_req (aio_req req)	135	static void req_cancel (aio_req req);
86	{
87	if (req->data)
88	SvREFCNT_dec (req->data);
89		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	}
		150
		151	/* must be called at most once */
		152	static SV *req_sv (aio_req req, const char *klass)
		153	{
		154	if (!req->self)
		155	{
		156	req->self = (SV *)newHV ();
		157	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		158	}
		159
		160	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
		161	}
		162
		163	static aio_req SvAIO_REQ (SV *sv)
		164	{
		165	MAGIC *mg;
		166
		167	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		168	croak ("object of class " AIO_REQ_KLASS " expected");
		169
		170	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		171
		172	return mg ? (aio_req)mg->mg_ptr : 0;
		173	}
		174
		175	static void aio_grp_feed (aio_req grp)
		176	{
		177	if (grp->sv2 && SvOK (grp->sv2))
		178	{
		179	dSP;
		180
		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)
		225	{
		226	case EIO_READDIR:
		227	{
		228	SV *rv = &PL_sv_undef;
		229
		230	if (req->result >= 0)
		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	{
		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;
		334	}
		335
		336	errno = req->errorno;
		337
		338	PUTBACK;
		339	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		340	SPAGAIN;
		341
		342	FREETMPS;
		343	LEAVE;
		344
		345	PUTBACK;
		346	}
		347
		348	return !!SvTRUE (ERRSV);
		349	}
		350
		351	static void req_destroy (aio_req req)
		352	{
90	if (req->fh)	353	if (req->self)
		354	{
		355	sv_unmagic (req->self, PERL_MAGIC_ext);
91	SvREFCNT_dec (req->fh);	356	SvREFCNT_dec (req->self);
		357	}
92		358
93	if (req->fh2)	359	SvREFCNT_dec (req->sv1);
94	SvREFCNT_dec (req->fh2);	360	SvREFCNT_dec (req->sv2);
95
96	if (req->statdata)
97	Safefree (req->statdata);
98
99	if (req->callback)
100	SvREFCNT_dec (req->callback);	361	SvREFCNT_dec (req->callback);
101		362
102	Safefree (req);	363	Safefree (req);
103	}	364	}
104		365
		366	static void req_cancel_subs (aio_req grp)
		367	{
		368	aio_req sub;
		369
		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
105	static void	385	static void
106	poll_wait ()	386	create_respipe (void)
107	{	387	{
108	if (nreqs && !ress)	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)
109	{	401	{
110	fd_set rfd;	402	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
111	FD_ZERO(&rfd);	403	croak ("unable to initialize result pipe(2)");
112	FD_SET(respipe [0], &rfd);
113		404
114	select (respipe [0] + 1, &rfd, 0, 0, 0);	405	respipe_close (respipe [0]);
		406	respipe [0] = old_readfd;
115	}	407	}
116	}
117		408
118	static int	409	#ifdef _WIN32
119	poll_cb ()	410	int arg = 1;
120	{	411	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
121	dSP;	412	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
122	int count = 0;	413	#else
123	int do_croak = 0;	414	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
124	aio_req req;	415	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		416	#endif
		417	croak ("unable to initialize result pipe(3)");
125		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
		447	static int poll_cb (void)
		448	{
126	for (;;)	449	for (;;)
127	{	450	{
128	pthread_mutex_lock (&reslock);	451	int res = eio_poll ();
129	req = ress;
130		452
131	if (req)	453	if (res > 0)
132	{
133	ress = req->next;
134
135	if (!ress)
136	{
137	/* read any signals sent by the worker threads */
138	char buf [32];
139	while (read (respipe [0], buf, 32) == 32)
140	;
141
142	rese = 0;
143	}
144	}
145
146	pthread_mutex_unlock (&reslock);
147
148	if (!req)
149	break;
150
151	nreqs--;
152
153	if (req->type == REQ_QUIT)
154	started--;
155	else
156	{
157	int errorno = errno;
158	errno = req->errorno;
159
160	if (req->type == REQ_READ)
161	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
162
163	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
164	SvREADONLY_off (req->data);
165
166	if (req->statdata)
167	{
168	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
169	PL_laststatval = req->result;
170	PL_statcache = *(req->statdata);
171	}
172
173	ENTER;
174	PUSHMARK (SP);
175	XPUSHs (sv_2mortal (newSViv (req->result)));
176
177	if (req->type == REQ_OPEN)
178	{
179	/* convert fd to fh */
180	SV *fh;
181
182	PUTBACK;
183	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
184	SPAGAIN;
185
186	fh = SvREFCNT_inc (POPs);
187
188	PUSHMARK (SP);
189	XPUSHs (sv_2mortal (fh));
190	}
191
192	if (SvOK (req->callback))
193	{
194	PUTBACK;
195	call_sv (req->callback, G_VOID | G_EVAL);
196	SPAGAIN;
197
198	if (SvTRUE (ERRSV))
199	{
200	free_req (req);
201	croak (0);	454	croak (0);
202	}
203	}
204		455
205	LEAVE;	456	if (!max_outstanding || max_outstanding > eio_nreqs ())
		457	return res;
206		458
207	errno = errorno;	459	poll_wait ();
208	count++;
209	}
210
211	free_req (req);
212	}	460	}
213
214	return count;
215	}
216
217	static void *aio_proc(void *arg);
218
219	static void
220	start_thread (void)
221	{
222	sigset_t fullsigset, oldsigset;
223	pthread_t tid;
224	pthread_attr_t attr;
225
226	pthread_attr_init (&attr);
227	pthread_attr_setstacksize (&attr, STACKSIZE);
228	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
229
230	sigfillset (&fullsigset);
231	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
232
233	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
234	started++;
235
236	sigprocmask (SIG_SETMASK, &oldsigset, 0);
237	}
238
239	static void
240	send_req (aio_req req)
241	{
242	while (started < wanted && nreqs >= started)
243	start_thread ();
244
245	nreqs++;
246
247	pthread_mutex_lock (&reqlock);
248
249	req->next = 0;
250
251	if (reqe)
252	{
253	reqe->next = req;
254	reqe = req;
255	}
256	else
257	reqe = reqs = req;
258
259	pthread_cond_signal (&reqwait);
260	pthread_mutex_unlock (&reqlock);
261
262	if (nreqs > max_outstanding)
263	for (;;)
264	{
265	poll_cb ();
266
267	if (nreqs <= max_outstanding)
268	break;
269
270	poll_wait ();
271	}
272	}
273
274	static void
275	end_thread (void)
276	{
277	aio_req req;
278	Newz (0, req, 1, aio_cb);
279	req->type = REQ_QUIT;
280
281	send_req (req);
282	}
283
284	static void min_parallel (int nthreads)
285	{
286	if (wanted < nthreads)
287	wanted = nthreads;
288	}
289
290	static void max_parallel (int nthreads)
291	{
292	int cur = started;
293
294	if (wanted > nthreads)
295	wanted = nthreads;
296
297	while (cur > wanted)
298	{
299	end_thread ();
300	cur--;
301	}
302
303	while (started > wanted)
304	{
305	poll_wait ();
306	poll_cb ();
307	}
308	}
309
310	static void create_pipe ()
311	{
312	if (pipe (respipe))
313	croak ("unable to initialize result pipe");
314
315	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
316	croak ("cannot set result pipe to nonblocking mode");
317
318	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
319	croak ("cannot set result pipe to nonblocking mode");
320	}
321
322	static void atfork_prepare (void)
323	{
324	pthread_mutex_lock (&reqlock);
325	pthread_mutex_lock (&reslock);
326	}
327
328	static void atfork_parent (void)
329	{
330	pthread_mutex_unlock (&reslock);
331	pthread_mutex_unlock (&reqlock);
332	}	461	}
333		462
334	static void atfork_child (void)	463	static void atfork_child (void)
335	{	464	{
336	aio_req prv;
337
338	started = 0;
339
340	while (reqs)
341	{
342	prv = reqs;
343	reqs = prv->next;
344	free_req (prv);
345	}
346
347	reqs = reqe = 0;
348
349	while (ress)
350	{
351	prv = ress;
352	ress = prv->next;
353	free_req (prv);
354	}
355
356	ress = rese = 0;
357
358	close (respipe [0]);
359	close (respipe [1]);
360	create_pipe ();	465	create_respipe ();
361
362	atfork_parent ();
363	}	466	}
364		467
365	/*****************************************************************************/	468	static SV *
366	/* work around various missing functions */	469	get_cb (SV *cb_sv)
		470	{
		471	HV *st;
		472	GV *gvp;
		473	CV *cv;
367		474
368	#if !HAVE_PREADWRITE	475	if (!SvOK (cb_sv))
369	# define pread aio_pread	476	return 0;
370	# define pwrite aio_pwrite
371		477
372	/*	478	cv = sv_2cv (cb_sv, &st, &gvp, 0);
373	* make our pread/pwrite safe against themselves, but not against
374	* normal read/write by using a mutex. slows down execution a lot,
375	* but that's your problem, not mine.
376	*/
377	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;
378		479
		480	if (!cv)
		481	croak ("IO::AIO callback must be undef or a CODE reference");
		482
		483	return (SV *)cv;
		484	}
		485
		486	#define dREQ \
		487	SV *cb_cv; \
		488	aio_req req; \
		489	int req_pri = next_pri; \
		490	next_pri = EIO_PRI_DEFAULT; \
		491	\
		492	cb_cv = get_cb (callback); \
		493	\
		494	Newz (0, req, 1, eio_req); \
		495	if (!req) \
		496	croak ("out of memory during eio_req allocation"); \
		497	\
		498	req->callback = SvREFCNT_inc (cb_cv); \
		499	req->pri = req_pri
		500
		501	#define REQ_SEND \
		502	PUTBACK; \
		503	req_submit (req); \
		504	SPAGAIN; \
		505	\
		506	if (GIMME_V != G_VOID) \
		507	XPUSHs (req_sv (req, AIO_REQ_KLASS));
		508
379	static ssize_t	509	static int
380	pread (int fd, void *buf, size_t count, off_t offset)	510	extract_fd (SV *fh, int wr)
381	{	511	{
382	ssize_t res;	512	int fd = PerlIO_fileno (wr ? IoOFP (sv_2io (fh)) : IoIFP (sv_2io (fh)));
383	off_t ooffset;
384		513
385	pthread_mutex_lock (&iolock);	514	if (fd < 0)
386	ooffset = lseek (fd, 0, SEEK_CUR);	515	croak ("illegal fh argument, either not an OS file or read/write mode mismatch");
387	lseek (fd, offset, SEEK_SET);
388	res = read (fd, buf, count);
389	lseek (fd, ooffset, SEEK_SET);
390	pthread_mutex_unlock (&iolock);
391		516
392	return res;	517	return fd;
393	}	518	}
394		519
395	static ssize_t	520	MODULE = IO::AIO PACKAGE = IO::AIO
396	pwrite (int fd, void *buf, size_t count, off_t offset)
397	{
398	ssize_t res;
399	off_t ooffset;
400		521
401	pthread_mutex_lock (&iolock);	522	PROTOTYPES: ENABLE
402	ooffset = lseek (fd, 0, SEEK_CUR);
403	lseek (fd, offset, SEEK_SET);
404	res = write (fd, buf, count);
405	lseek (fd, offset, SEEK_SET);
406	pthread_mutex_unlock (&iolock);
407		523
408	return res;	524	BOOT:
409	}	525	{
		526	stash = gv_stashpv ("IO::AIO", 1);
		527
		528	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		529	newCONSTSUB (stash, "ENOSYS", newSViv (ENOSYS));
		530	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		531	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		532	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		533	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		534	#ifndef _WIN32
		535	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
410	#endif	536	#endif
		537	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		538	newCONSTSUB (stash, "SYNC_FILE_RANGE_WAIT_BEFORE", newSViv (EIO_SYNC_FILE_RANGE_WAIT_BEFORE));
		539	newCONSTSUB (stash, "SYNC_FILE_RANGE_WRITE" , newSViv (EIO_SYNC_FILE_RANGE_WRITE));
		540	newCONSTSUB (stash, "SYNC_FILE_RANGE_WAIT_AFTER" , newSViv (EIO_SYNC_FILE_RANGE_WAIT_AFTER));
411		541
412	#if !HAVE_FDATASYNC	542	create_respipe ();
413	# define fdatasync fsync
414	#endif
415		543
416	#if !HAVE_READAHEAD	544	if (eio_init (want_poll, done_poll) < 0)
417	# define readahead aio_readahead	545	croak ("IO::AIO: unable to initialise eio library");
418		546
419	static char readahead_buf[4096];	547	/* atfork child called in fifo order, so before eio's handler */
420		548	X_THREAD_ATFORK (0, 0, atfork_child);
421	static ssize_t
422	readahead (int fd, off_t offset, size_t count)
423	{
424	while (count > 0)
425	{
426	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
427
428	pread (fd, readahead_buf, len, offset);
429	offset += len;
430	count -= len;
431	}
432
433	errno = 0;
434	}	549	}
435	#endif
436		550
437	/* sendfile always needs emulation */
438	static ssize_t
439	sendfile_ (int ofd, int ifd, off_t offset, size_t count)
440	{
441	ssize_t res;
442
443	if (!count)
444	return 0;
445
446	#if HAVE_SENDFILE
447	# if __linux
448	res = sendfile (ofd, ifd, &offset, count);
449
450	# elif __freebsd
451	/*
452	* Of course, the freebsd sendfile is a dire hack with no thoughts
453	* wasted on making it similar to other I/O functions.
454	*/
455	{
456	off_t sbytes;
457	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
458
459	if (res < 0 && sbytes)
460	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
461	res = sbytes;
462	}
463
464	# elif __hpux
465	res = sendfile (ofd, ifd, offset, count, 0, 0);
466
467	# elif __solaris
468	{
469	struct sendfilevec vec;
470	size_t sbytes;
471
472	vec.sfv_fd = ifd;
473	vec.sfv_flag = 0;
474	vec.sfv_off = offset;
475	vec.sfv_len = count;
476
477	res = sendfilev (ofd, &vec, 1, &sbytes);
478
479	if (res < 0 && sbytes)
480	res = sbytes;
481	}
482
483	# else
484	res = -1;
485	errno = ENOSYS;
486	# endif
487	#endif
488
489	if (res < 0
490	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
491	#if __solaris
492	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
493	#endif
494	)
495	)
496	{
497	/* emulate sendfile. this is a major pain in the ass */
498	char *buf = malloc (4096);
499	res = 0;
500
501	for (;;)
502	{
503	ssize_t cnt;
504
505	cnt = pread (ifd, buf, 4096, offset);
506
507	if (cnt <= 0)
508	{
509	if (cnt && !res) res = -1;
510	break;
511	}
512
513	cnt = write (ofd, buf, cnt);
514
515	if (cnt <= 0)
516	{
517	if (cnt && !res) res = -1;
518	break;
519	}
520
521	offset += cnt;
522	res += cnt;
523	}
524
525	{
526	int errorno = errno;
527	free (buf);
528	errno = errorno;
529	}
530	}
531
532	return res;
533	}
534
535	/*****************************************************************************/
536
537	static void *
538	aio_proc (void *thr_arg)
539	{
540	aio_req req;
541	int type;
542
543	do
544	{
545	pthread_mutex_lock (&reqlock);
546
547	for (;;)
548	{
549	req = reqs;
550
551	if (reqs)
552	{
553	reqs = reqs->next;
554	if (!reqs) reqe = 0;
555	}
556
557	if (req)
558	break;
559
560	pthread_cond_wait (&reqwait, &reqlock);
561	}
562
563	pthread_mutex_unlock (&reqlock);
564
565	errno = 0; /* strictly unnecessary */
566
567	type = req->type;
568
569	switch (type)
570	{
571	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
572	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
573
574	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
575	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
576
577	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
578	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
579	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
580
581	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
582	case REQ_CLOSE: req->result = close (req->fd); break;
583	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
584	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
585	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
586
587	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
588	case REQ_FSYNC: req->result = fsync (req->fd); break;
589
590	case REQ_QUIT:
591	break;
592
593	default:
594	req->result = ENOSYS;
595	break;
596	}
597
598	req->errorno = errno;
599
600	pthread_mutex_lock (&reslock);
601
602	req->next = 0;
603
604	if (rese)
605	{
606	rese->next = req;
607	rese = req;
608	}
609	else
610	{
611	rese = ress = req;
612
613	/* write a dummy byte to the pipe so fh becomes ready */
614	write (respipe [1], &respipe, 1);
615	}
616
617	pthread_mutex_unlock (&reslock);
618	}
619	while (type != REQ_QUIT);
620
621	return 0;
622	}
623
624	#define dREQ \
625	aio_req req; \
626	\
627	if (SvOK (callback) && !SvROK (callback)) \
628	croak ("clalback must be undef or of reference type"); \
629	\
630	Newz (0, req, 1, aio_cb); \
631	if (!req) \
632	croak ("out of memory during aio_req allocation"); \
633	\
634	req->callback = newSVsv (callback);
635
636	MODULE = IO::AIO PACKAGE = IO::AIO
637
638	PROTOTYPES: ENABLE
639
640	BOOT:
641	{
642	create_pipe ();
643	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
644	}
645
646	void	551	void
647	min_parallel(nthreads)	552	max_poll_reqs (int nreqs)
648	int nthreads
649	PROTOTYPE: $	553	PROTOTYPE: $
		554	CODE:
		555	eio_set_max_poll_reqs (nreqs);
650		556
651	void	557	void
652	max_parallel(nthreads)	558	max_poll_time (double nseconds)
653	int nthreads
654	PROTOTYPE: $	559	PROTOTYPE: $
655
656	int
657	max_outstanding(nreqs)
658	int nreqs
659	PROTOTYPE: $
660	CODE:	560	CODE:
661	RETVAL = max_outstanding;	561	eio_set_max_poll_time (nseconds);
		562
		563	void
		564	min_parallel (int nthreads)
		565	PROTOTYPE: $
		566	CODE:
		567	eio_set_min_parallel (nthreads);
		568
		569	void
		570	max_parallel (int nthreads)
		571	PROTOTYPE: $
		572	CODE:
		573	eio_set_max_parallel (nthreads);
		574
		575	void
		576	max_idle (int nthreads)
		577	PROTOTYPE: $
		578	CODE:
		579	eio_set_max_idle (nthreads);
		580
		581	void
		582	max_outstanding (int maxreqs)
		583	PROTOTYPE: $
		584	CODE:
662	max_outstanding = nreqs;	585	max_outstanding = maxreqs;
663		586
664	void	587	void
665	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	588	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
666	SV * pathname
667	int flags
668	int mode
669	SV * callback
670	PROTOTYPE: $$$;$	589	PROTOTYPE: $$$;$
671	CODE:	590	PPCODE:
672	{	591	{
673	dREQ;	592	dREQ;
674		593
675	req->type = REQ_OPEN;	594	req->type = EIO_OPEN;
676	req->data = newSVsv (pathname);	595	req->sv1 = newSVsv (pathname);
677	req->dataptr = SvPVbyte_nolen (req->data);	596	req->ptr1 = SvPVbyte_nolen (req->sv1);
678	req->fd = flags;	597	req->int1 = flags;
679	req->mode = mode;	598	req->int2 = mode;
680		599
681	send_req (req);	600	REQ_SEND;
682	}	601	}
683		602
684	void	603	void
685	aio_close(fh,callback=&PL_sv_undef)	604	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
686	SV * fh
687	SV * callback
688	PROTOTYPE: $;$	605	PROTOTYPE: $;$
689	ALIAS:	606	ALIAS:
690	aio_close = REQ_CLOSE
691	aio_fsync = REQ_FSYNC	607	aio_fsync = EIO_FSYNC
692	aio_fdatasync = REQ_FDATASYNC	608	aio_fdatasync = EIO_FDATASYNC
693	CODE:	609	PPCODE:
694	{	610	{
		611	int fd = extract_fd (fh, 0);
695	dREQ;	612	dREQ;
696		613
697	req->type = ix;	614	req->type = ix;
698	req->fh = newSVsv (fh);	615	req->sv1 = newSVsv (fh);
699	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	616	req->int1 = fd;
700		617
701	send_req (req);	618	REQ_SEND (req);
702	}	619	}
703		620
704	void	621	void
		622	aio_sync_file_range (SV *fh, SV *offset, SV *nbytes, IV flags, SV *callback=&PL_sv_undef)
		623	PROTOTYPE: $$$$;$
		624	PPCODE:
		625	{
		626	int fd = extract_fd (fh, 0);
		627	dREQ;
		628
		629	req->type = EIO_SYNC_FILE_RANGE;
		630	req->sv1 = newSVsv (fh);
		631	req->int1 = fd;
		632	req->offs = SvVAL64 (offset);
		633	req->size = SvVAL64 (nbytes);
		634	req->int2 = flags;
		635
		636	REQ_SEND (req);
		637	}
		638
		639	void
		640	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		641	PROTOTYPE: $;$
		642	PPCODE:
		643	{
		644	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		645	int fd = extract_fd (fh, 0);
		646	dREQ;
		647
		648	if (close_pipe < 0)
		649	{
		650	int pipefd [2];
		651
		652	if (pipe (pipefd) < 0
		653	|| close (pipefd [1]) < 0
		654	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		655	abort (); /*D*/
		656
		657	close_pipe = pipefd [0];
		658	}
		659
		660	req->type = EIO_DUP2;
		661	req->int1 = close_pipe;
		662	req->sv2 = newSVsv (fh);
		663	req->int2 = fd;
		664
		665	REQ_SEND (req);
		666	}
		667
		668	void
705	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	669	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
706	SV * fh
707	UV offset
708	UV length
709	SV * data
710	UV dataoffset
711	SV * callback
712	ALIAS:	670	ALIAS:
713	aio_read = REQ_READ	671	aio_read = EIO_READ
714	aio_write = REQ_WRITE	672	aio_write = EIO_WRITE
715	PROTOTYPE: $$$$$;$	673	PROTOTYPE: $$$$$;$
716	CODE:	674	PPCODE:
717	{	675	{
718	aio_req req;
719	STRLEN svlen;	676	STRLEN svlen;
		677	int fd = extract_fd (fh, ix == EIO_WRITE);
720	char *svptr = SvPVbyte (data, svlen);	678	char *svptr = SvPVbyte (data, svlen);
721		679	UV len = SvUV (length);
722	SvUPGRADE (data, SVt_PV);
723	SvPOK_on (data);
724		680
725	if (dataoffset < 0)	681	if (dataoffset < 0)
726	dataoffset += svlen;	682	dataoffset += svlen;
727		683
728	if (dataoffset < 0 || dataoffset > svlen)	684	if (dataoffset < 0 || dataoffset > svlen)
729	croak ("data offset outside of string");	685	croak ("dataoffset outside of data scalar");
730		686
731	if (ix == REQ_WRITE)	687	if (ix == EIO_WRITE)
732	{	688	{
733	/* write: check length and adjust. */	689	/* write: check length and adjust. */
734	if (length < 0 || length + dataoffset > svlen)	690	if (!SvOK (length) || len + dataoffset > svlen)
735	length = svlen - dataoffset;	691	len = svlen - dataoffset;
736	}	692	}
737	else	693	else
738	{	694	{
739	/* read: grow scalar as necessary */	695	/* read: check type and grow scalar as necessary */
		696	SvUPGRADE (data, SVt_PV);
740	svptr = SvGROW (data, length + dataoffset);	697	svptr = SvGROW (data, len + dataoffset + 1);
741	}	698	}
742
743	if (length < 0)
744	croak ("length must not be negative");
745		699
746	{	700	{
747	dREQ;	701	dREQ;
748		702
749	req->type = ix;	703	req->type = ix;
750	req->fh = newSVsv (fh);	704	req->sv1 = newSVsv (fh);
751	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	705	req->int1 = fd;
752	: IoOFP (sv_2io (fh)));	706	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
753	req->offset = offset;	707	req->size = len;
754	req->length = length;
755	req->data = SvREFCNT_inc (data);	708	req->sv2 = SvREFCNT_inc (data);
756	req->dataptr = (char *)svptr + dataoffset;	709	req->ptr2 = (char *)svptr + dataoffset;
		710	req->stroffset = dataoffset;
757		711
758	if (!SvREADONLY (data))	712	if (!SvREADONLY (data))
759	{	713	{
760	SvREADONLY_on (data);	714	SvREADONLY_on (data);
761	req->data2ptr = (void *)data;	715	req->flags |= FLAG_SV2_RO_OFF;
762	}	716	}
763		717
764	send_req (req);	718	REQ_SEND;
765	}	719	}
766	}	720	}
767		721
768	void	722	void
		723	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		724	PROTOTYPE: $$;$
		725	PPCODE:
		726	{
		727	SV *data;
		728	dREQ;
		729
		730	req->type = EIO_READLINK;
		731	req->sv1 = newSVsv (path);
		732	req->ptr1 = SvPVbyte_nolen (req->sv1);
		733
		734	REQ_SEND;
		735	}
		736
		737	void
769	aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	738	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
770	SV * out_fh
771	SV * in_fh
772	UV in_offset
773	UV length
774	SV * callback
775	PROTOTYPE: $$$$;$	739	PROTOTYPE: $$$$;$
776	CODE:	740	PPCODE:
777	{	741	{
		742	int ifd = extract_fd (in_fh , 0);
		743	int ofd = extract_fd (out_fh, 0);
778	dREQ;	744	dREQ;
779		745
780	req->type = REQ_SENDFILE;	746	req->type = EIO_SENDFILE;
781	req->fh = newSVsv (out_fh);	747	req->sv1 = newSVsv (out_fh);
782	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	748	req->int1 = ofd;
783	req->fh2 = newSVsv (in_fh);	749	req->sv2 = newSVsv (in_fh);
784	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	750	req->int2 = ifd;
785	req->offset = in_offset;	751	req->offs = SvVAL64 (in_offset);
786	req->length = length;	752	req->size = length;
787		753
788	send_req (req);	754	REQ_SEND;
789	}	755	}
790		756
791	void	757	void
792	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	758	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
793	SV * fh
794	UV offset
795	IV length
796	SV * callback
797	PROTOTYPE: $$$;$	759	PROTOTYPE: $$$;$
798	CODE:	760	PPCODE:
799	{	761	{
		762	int fd = extract_fd (fh, 0);
800	dREQ;	763	dREQ;
801		764
802	req->type = REQ_READAHEAD;	765	req->type = EIO_READAHEAD;
803	req->fh = newSVsv (fh);	766	req->sv1 = newSVsv (fh);
804	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	767	req->int1 = fd;
805	req->offset = offset;	768	req->offs = SvVAL64 (offset);
806	req->length = length;	769	req->size = length;
807		770
808	send_req (req);	771	REQ_SEND;
809	}	772	}
810		773
811	void	774	void
812	aio_stat(fh_or_path,callback=&PL_sv_undef)	775	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
813	SV * fh_or_path
814	SV * callback
815	ALIAS:	776	ALIAS:
816	aio_stat = REQ_STAT	777	aio_stat = EIO_STAT
817	aio_lstat = REQ_LSTAT	778	aio_lstat = EIO_LSTAT
818	CODE:	779	PPCODE:
819	{	780	{
820	dREQ;	781	dREQ;
821		782
822	New (0, req->statdata, 1, Stat_t);	783	req->sv1 = newSVsv (fh_or_path);
823	if (!req->statdata)
824	{
825	free_req (req);
826	croak ("out of memory during aio_req->statdata allocation");
827	}
828		784
829	if (SvPOK (fh_or_path))	785	if (SvPOK (req->sv1))
830	{	786	{
831	req->type = ix;	787	req->type = ix;
832	req->data = newSVsv (fh_or_path);
833	req->dataptr = SvPVbyte_nolen (req->data);	788	req->ptr1 = SvPVbyte_nolen (req->sv1);
834	}	789	}
835	else	790	else
836	{	791	{
837	req->type = REQ_FSTAT;	792	req->type = EIO_FSTAT;
838	req->fh = newSVsv (fh_or_path);
839	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	793	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		794	}
		795
		796	REQ_SEND;
		797	}
		798
		799	void
		800	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		801	PPCODE:
		802	{
		803	dREQ;
		804
		805	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		806	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		807	req->sv1 = newSVsv (fh_or_path);
		808
		809	if (SvPOK (req->sv1))
840	}	810	{
		811	req->type = EIO_UTIME;
		812	req->ptr1 = SvPVbyte_nolen (req->sv1);
		813	}
		814	else
		815	{
		816	req->type = EIO_FUTIME;
		817	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		818	}
841		819
842	send_req (req);	820	REQ_SEND;
843	}	821	}
844		822
845	void	823	void
		824	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		825	PPCODE:
		826	{
		827	dREQ;
		828
		829	req->sv1 = newSVsv (fh_or_path);
		830	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		831
		832	if (SvPOK (req->sv1))
		833	{
		834	req->type = EIO_TRUNCATE;
		835	req->ptr1 = SvPVbyte_nolen (req->sv1);
		836	}
		837	else
		838	{
		839	req->type = EIO_FTRUNCATE;
		840	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		841	}
		842
		843	REQ_SEND;
		844	}
		845
		846	void
		847	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		848	ALIAS:
		849	aio_chmod = EIO_CHMOD
		850	aio_mkdir = EIO_MKDIR
		851	PPCODE:
		852	{
		853	dREQ;
		854
		855	req->int2 = mode;
		856	req->sv1 = newSVsv (fh_or_path);
		857
		858	if (SvPOK (req->sv1))
		859	{
		860	req->type = ix;
		861	req->ptr1 = SvPVbyte_nolen (req->sv1);
		862	}
		863	else
		864	{
		865	req->type = EIO_FCHMOD;
		866	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		867	}
		868
		869	REQ_SEND;
		870	}
		871
		872	void
		873	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		874	PPCODE:
		875	{
		876	dREQ;
		877
		878	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		879	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		880	req->sv1 = newSVsv (fh_or_path);
		881
		882	if (SvPOK (req->sv1))
		883	{
		884	req->type = EIO_CHOWN;
		885	req->ptr1 = SvPVbyte_nolen (req->sv1);
		886	}
		887	else
		888	{
		889	req->type = EIO_FCHOWN;
		890	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		891	}
		892
		893	REQ_SEND;
		894	}
		895
		896	void
846	aio_unlink(pathname,callback=&PL_sv_undef)	897	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
847	SV * pathname
848	SV * callback
849	ALIAS:	898	ALIAS:
850	aio_unlink = REQ_UNLINK	899	aio_unlink = EIO_UNLINK
851	aio_rmdir = REQ_RMDIR	900	aio_rmdir = EIO_RMDIR
		901	aio_readdir = EIO_READDIR
852	CODE:	902	PPCODE:
853	{	903	{
854	dREQ;	904	dREQ;
855		905
856	req->type = ix;	906	req->type = ix;
857	req->data = newSVsv (pathname);	907	req->sv1 = newSVsv (pathname);
858	req->dataptr = SvPVbyte_nolen (req->data);	908	req->ptr1 = SvPVbyte_nolen (req->sv1);
		909
		910	REQ_SEND;
		911	}
		912
		913	void
		914	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		915	ALIAS:
		916	aio_link = EIO_LINK
		917	aio_symlink = EIO_SYMLINK
		918	aio_rename = EIO_RENAME
		919	PPCODE:
		920	{
		921	dREQ;
859		922
860	send_req (req);	923	req->type = ix;
861	}	924	req->sv1 = newSVsv (oldpath);
862		925	req->ptr1 = SvPVbyte_nolen (req->sv1);
863	void	926	req->sv2 = newSVsv (newpath);
864	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	927	req->ptr2 = SvPVbyte_nolen (req->sv2);
865	SV * oldpath
866	SV * newpath
867	SV * callback
868	CODE:
869	{
870	dREQ;
871		928
872	req->type = REQ_SYMLINK;	929	REQ_SEND;
873	req->fh = newSVsv (oldpath);	930	}
874	req->data2ptr = SvPVbyte_nolen (req->fh);	931
875	req->data = newSVsv (newpath);	932	void
876	req->dataptr = SvPVbyte_nolen (req->data);	933	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		934	PPCODE:
		935	{
		936	dREQ;
877		937
878	send_req (req);	938	req->type = EIO_MKNOD;
		939	req->sv1 = newSVsv (pathname);
		940	req->ptr1 = SvPVbyte_nolen (req->sv1);
		941	req->int2 = (mode_t)mode;
		942	req->offs = dev;
		943
		944	REQ_SEND;
879	}	945	}
880		946
881	void	947	void
		948	aio_busy (double delay, SV *callback=&PL_sv_undef)
		949	PPCODE:
		950	{
		951	dREQ;
		952
		953	req->type = EIO_BUSY;
		954	req->nv1 = delay < 0. ? 0. : delay;
		955
		956	REQ_SEND;
		957	}
		958
		959	void
		960	aio_group (SV *callback=&PL_sv_undef)
		961	PROTOTYPE: ;$
		962	PPCODE:
		963	{
		964	dREQ;
		965
		966	req->type = EIO_GROUP;
		967
		968	req_submit (req);
		969	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		970	}
		971
		972	void
		973	aio_nop (SV *callback=&PL_sv_undef)
		974	ALIAS:
		975	aio_nop = EIO_NOP
		976	aio_sync = EIO_SYNC
		977	PPCODE:
		978	{
		979	dREQ;
		980
		981	req->type = ix;
		982
		983	REQ_SEND;
		984	}
		985
		986	int
		987	aioreq_pri (int pri = 0)
		988	PROTOTYPE: ;$
		989	CODE:
		990	RETVAL = next_pri;
		991	if (items > 0)
		992	{
		993	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		994	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		995	next_pri = pri;
		996	}
		997	OUTPUT:
		998	RETVAL
		999
		1000	void
		1001	aioreq_nice (int nice = 0)
		1002	CODE:
		1003	nice = next_pri - nice;
		1004	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1005	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1006	next_pri = nice;
		1007
		1008	void
882	flush()	1009	flush ()
883	PROTOTYPE:	1010	PROTOTYPE:
884	CODE:	1011	CODE:
885	while (nreqs)	1012	while (eio_nreqs ())
886	{	1013	{
887	poll_wait ();	1014	poll_wait ();
888	poll_cb ();	1015	poll_cb ();
889	}	1016	}
890		1017
891	void	1018	int
892	poll()	1019	poll()
893	PROTOTYPE:	1020	PROTOTYPE:
894	CODE:	1021	CODE:
895	if (nreqs)
896	{
897	poll_wait ();	1022	poll_wait ();
898	poll_cb ();	1023	RETVAL = poll_cb ();
899	}	1024	OUTPUT:
		1025	RETVAL
900		1026
901	int	1027	int
902	poll_fileno()	1028	poll_fileno()
903	PROTOTYPE:	1029	PROTOTYPE:
904	CODE:	1030	CODE:
…		…
916		1042
917	void	1043	void
918	poll_wait()	1044	poll_wait()
919	PROTOTYPE:	1045	PROTOTYPE:
920	CODE:	1046	CODE:
921	if (nreqs)
922	poll_wait ();	1047	poll_wait ();
923		1048
924	int	1049	int
925	nreqs()	1050	nreqs()
926	PROTOTYPE:	1051	PROTOTYPE:
927	CODE:	1052	CODE:
928	RETVAL = nreqs;	1053	RETVAL = eio_nreqs ();
929	OUTPUT:	1054	OUTPUT:
930	RETVAL	1055	RETVAL
931		1056
		1057	int
		1058	nready()
		1059	PROTOTYPE:
		1060	CODE:
		1061	RETVAL = eio_nready ();
		1062	OUTPUT:
		1063	RETVAL
		1064
		1065	int
		1066	npending()
		1067	PROTOTYPE:
		1068	CODE:
		1069	RETVAL = eio_npending ();
		1070	OUTPUT:
		1071	RETVAL
		1072
		1073	int
		1074	nthreads()
		1075	PROTOTYPE:
		1076	CODE:
		1077	RETVAL = eio_nthreads ();
		1078	OUTPUT:
		1079	RETVAL
		1080
		1081	void _on_next_submit (SV *cb)
		1082	CODE:
		1083	SvREFCNT_dec (on_next_submit);
		1084	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1085
		1086	PROTOTYPES: DISABLE
		1087
		1088	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1089
		1090	void
		1091	cancel (aio_req_ornot req)
		1092	CODE:
		1093	eio_cancel (req);
		1094
		1095	void
		1096	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1097	PPCODE:
		1098	{
		1099	if (GIMME_V != G_VOID)
		1100	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1101
		1102	if (items > 1)
		1103	{
		1104	SV *cb_cv = get_cb (callback);
		1105
		1106	SvREFCNT_dec (req->callback);
		1107	req->callback = SvREFCNT_inc (cb_cv);
		1108	}
		1109	}
		1110
		1111	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1112
		1113	void
		1114	add (aio_req grp, ...)
		1115	PPCODE:
		1116	{
		1117	int i;
		1118
		1119	if (grp->int1 == 2)
		1120	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1121
		1122	for (i = 1; i < items; ++i )
		1123	{
		1124	aio_req req;
		1125
		1126	if (GIMME_V != G_VOID)
		1127	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1128
		1129	req = SvAIO_REQ (ST (i));
		1130
		1131	if (req)
		1132	eio_grp_add (grp, req);
		1133	}
		1134	}
		1135
		1136	void
		1137	cancel_subs (aio_req_ornot req)
		1138	CODE:
		1139	req_cancel_subs (req);
		1140
		1141	void
		1142	result (aio_req grp, ...)
		1143	CODE:
		1144	{
		1145	int i;
		1146	AV *av;
		1147
		1148	grp->errorno = errno;
		1149
		1150	av = newAV ();
		1151
		1152	for (i = 1; i < items; ++i )
		1153	av_push (av, newSVsv (ST (i)));
		1154
		1155	SvREFCNT_dec (grp->sv1);
		1156	grp->sv1 = (SV *)av;
		1157	}
		1158
		1159	void
		1160	errno (aio_req grp, int errorno = errno)
		1161	CODE:
		1162	grp->errorno = errorno;
		1163
		1164	void
		1165	limit (aio_req grp, int limit)
		1166	CODE:
		1167	eio_grp_limit (grp, limit);
		1168
		1169	void
		1170	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1171	CODE:
		1172	{
		1173	SvREFCNT_dec (grp->sv2);
		1174	grp->sv2 = newSVsv (callback);
		1175	grp->feed = aio_grp_feed;
		1176
		1177	if (grp->int2 <= 0)
		1178	grp->int2 = 2;
		1179
		1180	eio_grp_limit (grp, grp->int2);
		1181	}
		1182

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