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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.32 by root, Mon Aug 22 23:20:37 2005 UTC vs.
Revision 1.137 by root, Sun Apr 19 13:19:57 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
		23	# define EIO_STRUCT_DIRENT Direntry_t
		24	# undef malloc
		25	# undef free
		26
		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
		59	#else
		60
25	# include <sys/uio.h>	61	# include <sys/time.h>
26	# elif __hpux
27	# include <sys/socket.h>	62	# include <sys/select.h>
28	# endif	63	# include <unistd.h>
		64	# include <utime.h>
		65	# include <signal.h>
		66	# define EIO_STRUCT_DIRENT struct dirent
		67
29	#endif	68	#endif
30		69
31	#if __ia64	70	/* perl stupidly overrides readdir and maybe others */
32	# 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
33	#else	81	#else
34	# define STACKSIZE 4096	82	# define SvVAL64 SvNV
35	#endif	83	#endif
36		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
37	enum {	119	enum {
38	REQ_QUIT,	120	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
39	REQ_OPEN, REQ_CLOSE,
40	REQ_READ, REQ_WRITE, REQ_READAHEAD,
41	REQ_SENDFILE,
42	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
43	REQ_FSYNC, REQ_FDATASYNC,
44	REQ_UNLINK, REQ_RMDIR,
45	REQ_SYMLINK,
46	};	121	};
47		122
48	typedef struct aio_cb {	123	#include "libeio/eio.c"
49	struct aio_cb *volatile next;
50		124
51	int type;
52
53	int fd, fd2;
54	off_t offset;
55	size_t length;
56	ssize_t result;
57	mode_t mode; /* open */
58	int errorno;
59	SV *data, *callback;
60	SV *fh, *fh2;
61	void *dataptr, *data2ptr;
62	STRLEN dataoffset;
63
64	Stat_t *statdata;
65	} aio_cb;
66
67	typedef aio_cb *aio_req;	125	typedef eio_req *aio_req;
		126	typedef eio_req *aio_req_ornot;
68		127
69	static int started, wanted;	128	static SV *on_next_submit;
70	static volatile int nreqs;	129	static int next_pri = EIO_PRI_DEFAULT;
71	static int max_outstanding = 1<<30;	130	static int max_outstanding;
72	static int respipe [2];
73		131
74	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	132	static int respipe_osf [2], respipe [2] = { -1, -1 };
75	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
76	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
77		133
78	static volatile aio_req reqs, reqe; /* queue start, queue end */	134	static void req_destroy (aio_req req);
79	static volatile aio_req ress, rese; /* queue start, queue end */
80
81	static void free_req (aio_req req)	135	static void req_cancel (aio_req req);
82	{
83	if (req->data)
84	SvREFCNT_dec (req->data);
85		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	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		318	*SvEND (req->sv2) = 0;
		319	PUSHs (sv_2mortal (newSViv (req->result)));
		320	break;
		321
		322	case EIO_DUP2:
		323	if (req->result > 0)
		324	req->result = 0;
		325	/* FALLTHROUGH */
		326
		327	default:
		328	PUSHs (sv_2mortal (newSViv (req->result)));
		329	break;
		330	}
		331
		332	errno = req->errorno;
		333
		334	PUTBACK;
		335	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		336	SPAGAIN;
		337
		338	FREETMPS;
		339	LEAVE;
		340
		341	PUTBACK;
		342	}
		343
		344	return !!SvTRUE (ERRSV);
		345	}
		346
		347	static void req_destroy (aio_req req)
		348	{
86	if (req->fh)	349	if (req->self)
		350	{
		351	sv_unmagic (req->self, PERL_MAGIC_ext);
87	SvREFCNT_dec (req->fh);	352	SvREFCNT_dec (req->self);
		353	}
88		354
89	if (req->fh2)	355	SvREFCNT_dec (req->sv1);
90	SvREFCNT_dec (req->fh2);	356	SvREFCNT_dec (req->sv2);
91
92	if (req->statdata)
93	Safefree (req->statdata);
94
95	if (req->callback)
96	SvREFCNT_dec (req->callback);	357	SvREFCNT_dec (req->callback);
97		358
98	Safefree (req);	359	Safefree (req);
99	}	360	}
100		361
		362	static void req_cancel_subs (aio_req grp)
		363	{
		364	aio_req sub;
		365
		366	if (grp->type != EIO_GROUP)
		367	return;
		368
		369	SvREFCNT_dec (grp->sv2);
		370	grp->sv2 = 0;
		371
		372	eio_grp_cancel (grp);
		373	}
		374
		375	#ifdef USE_SOCKETS_AS_HANDLES
		376	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		377	#else
		378	# define TO_SOCKET(x) (x)
		379	#endif
		380
101	static void	381	static void
102	poll_wait ()	382	create_respipe (void)
103	{	383	{
104	if (nreqs && !ress)	384	int old_readfd = respipe [0];
		385
		386	if (respipe [1] >= 0)
		387	respipe_close (TO_SOCKET (respipe [1]));
		388
		389	#ifdef _WIN32
		390	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		391	#else
		392	if (pipe (respipe))
		393	#endif
		394	croak ("unable to initialize result pipe");
		395
		396	if (old_readfd >= 0)
105	{	397	{
106	fd_set rfd;	398	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
107	FD_ZERO(&rfd);	399	croak ("unable to initialize result pipe(2)");
108	FD_SET(respipe [0], &rfd);
109		400
110	select (respipe [0] + 1, &rfd, 0, 0, 0);	401	respipe_close (respipe [0]);
		402	respipe [0] = old_readfd;
111	}	403	}
112	}
113		404
114	static int	405	#ifdef _WIN32
115	poll_cb ()	406	int arg = 1;
116	{	407	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
117	dSP;	408	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
118	int count = 0;	409	#else
119	int do_croak = 0;	410	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
120	aio_req req;	411	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		412	#endif
		413	croak ("unable to initialize result pipe(3)");
121		414
		415	respipe_osf [0] = TO_SOCKET (respipe [0]);
		416	respipe_osf [1] = TO_SOCKET (respipe [1]);
		417	}
		418
		419	static void poll_wait (void)
		420	{
		421	fd_set rfd;
		422
		423	while (eio_nreqs ())
		424	{
		425	int size;
		426
		427	X_LOCK (reslock);
		428	size = res_queue.size;
		429	X_UNLOCK (reslock);
		430
		431	if (size)
		432	return;
		433
		434	etp_maybe_start_thread ();
		435
		436	FD_ZERO (&rfd);
		437	FD_SET (respipe [0], &rfd);
		438
		439	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
		440	}
		441	}
		442
		443	static int poll_cb (void)
		444	{
122	for (;;)	445	for (;;)
123	{	446	{
124	pthread_mutex_lock (&reslock);	447	int res = eio_poll ();
125	req = ress;
126		448
127	if (req)	449	if (res > 0)
128	{
129	ress = req->next;
130
131	if (!ress)
132	{
133	/* read any signals sent by the worker threads */
134	char buf [32];
135	while (read (respipe [0], buf, 32) == 32)
136	;
137
138	rese = 0;
139	}
140	}
141
142	pthread_mutex_unlock (&reslock);
143
144	if (!req)
145	break;
146
147	nreqs--;
148
149	if (req->type == REQ_QUIT)
150	started--;
151	else
152	{
153	int errorno = errno;
154	errno = req->errorno;
155
156	if (req->type == REQ_READ)
157	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
158
159	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
160	SvREADONLY_off (req->data);
161
162	if (req->statdata)
163	{
164	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
165	PL_laststatval = req->result;
166	PL_statcache = *(req->statdata);
167	}
168
169	ENTER;
170	PUSHMARK (SP);
171	XPUSHs (sv_2mortal (newSViv (req->result)));
172
173	if (req->type == REQ_OPEN)
174	{
175	/* convert fd to fh */
176	SV *fh;
177
178	PUTBACK;
179	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
180	SPAGAIN;
181
182	fh = SvREFCNT_inc (POPs);
183
184	PUSHMARK (SP);
185	XPUSHs (sv_2mortal (fh));
186	}
187
188	if (SvOK (req->callback))
189	{
190	PUTBACK;
191	call_sv (req->callback, G_VOID | G_EVAL);
192	SPAGAIN;
193
194	if (SvTRUE (ERRSV))
195	{
196	free_req (req);
197	croak (0);	450	croak (0);
198	}
199	}
200		451
201	LEAVE;	452	if (!max_outstanding || max_outstanding > eio_nreqs ())
		453	return res;
202		454
203	errno = errorno;	455	poll_wait ();
204	count++;
205	}
206
207	free_req (req);
208	}	456	}
209
210	return count;
211	}
212
213	static void *aio_proc(void *arg);
214
215	static void
216	start_thread (void)
217	{
218	sigset_t fullsigset, oldsigset;
219	pthread_t tid;
220	pthread_attr_t attr;
221
222	pthread_attr_init (&attr);
223	pthread_attr_setstacksize (&attr, STACKSIZE);
224	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
225
226	sigfillset (&fullsigset);
227	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
228
229	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
230	started++;
231
232	sigprocmask (SIG_SETMASK, &oldsigset, 0);
233	}
234
235	static void
236	send_req (aio_req req)
237	{
238	while (started < wanted && nreqs >= started)
239	start_thread ();
240
241	nreqs++;
242
243	pthread_mutex_lock (&reqlock);
244
245	req->next = 0;
246
247	if (reqe)
248	{
249	reqe->next = req;
250	reqe = req;
251	}
252	else
253	reqe = reqs = req;
254
255	pthread_cond_signal (&reqwait);
256	pthread_mutex_unlock (&reqlock);
257
258	if (nreqs > max_outstanding)
259	for (;;)
260	{
261	poll_cb ();
262
263	if (nreqs <= max_outstanding)
264	break;
265
266	poll_wait ();
267	}
268	}
269
270	static void
271	end_thread (void)
272	{
273	aio_req req;
274	Newz (0, req, 1, aio_cb);
275	req->type = REQ_QUIT;
276
277	send_req (req);
278	}
279
280	static void min_parallel (int nthreads)
281	{
282	if (wanted < nthreads)
283	wanted = nthreads;
284	}
285
286	static void max_parallel (int nthreads)
287	{
288	int cur = started;
289
290	if (wanted > nthreads)
291	wanted = nthreads;
292
293	while (cur > wanted)
294	{
295	end_thread ();
296	cur--;
297	}
298
299	while (started > wanted)
300	{
301	poll_wait ();
302	poll_cb ();
303	}
304	}
305
306	static void create_pipe ()
307	{
308	if (pipe (respipe))
309	croak ("unable to initialize result pipe");
310
311	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
312	croak ("cannot set result pipe to nonblocking mode");
313
314	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
315	croak ("cannot set result pipe to nonblocking mode");
316	}
317
318	static void atfork_prepare (void)
319	{
320	pthread_mutex_lock (&reqlock);
321	pthread_mutex_lock (&reslock);
322	}
323
324	static void atfork_parent (void)
325	{
326	pthread_mutex_unlock (&reslock);
327	pthread_mutex_unlock (&reqlock);
328	}	457	}
329		458
330	static void atfork_child (void)	459	static void atfork_child (void)
331	{	460	{
332	aio_req prv;
333
334	started = 0;
335
336	while (reqs)
337	{
338	prv = reqs;
339	reqs = prv->next;
340	free_req (prv);
341	}
342
343	reqs = reqe = 0;
344
345	while (ress)
346	{
347	prv = ress;
348	ress = prv->next;
349	free_req (prv);
350	}
351
352	ress = rese = 0;
353
354	close (respipe [0]);
355	close (respipe [1]);
356	create_pipe ();	461	create_respipe ();
357
358	atfork_parent ();
359	}	462	}
360		463
361	/*****************************************************************************/	464	static SV *
362	/* work around various missing functions */	465	get_cb (SV *cb_sv)
		466	{
		467	HV *st;
		468	GV *gvp;
		469	CV *cv;
363		470
364	#if !HAVE_PREADWRITE	471	if (!SvOK (cb_sv))
365	# define pread aio_pread	472	return 0;
366	# define pwrite aio_pwrite
367		473
368	/*	474	cv = sv_2cv (cb_sv, &st, &gvp, 0);
369	* make our pread/pwrite safe against themselves, but not against
370	* normal read/write by using a mutex. slows down execution a lot,
371	* but that's your problem, not mine.
372	*/
373	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;
374		475
		476	if (!cv)
		477	croak ("IO::AIO callback must be undef or a CODE reference");
		478
		479	return (SV *)cv;
		480	}
		481
		482	#define dREQ \
		483	SV *cb_cv; \
		484	aio_req req; \
		485	int req_pri = next_pri; \
		486	next_pri = EIO_PRI_DEFAULT; \
		487	\
		488	cb_cv = get_cb (callback); \
		489	\
		490	Newz (0, req, 1, eio_req); \
		491	if (!req) \
		492	croak ("out of memory during eio_req allocation"); \
		493	\
		494	req->callback = SvREFCNT_inc (cb_cv); \
		495	req->pri = req_pri
		496
		497	#define REQ_SEND \
		498	PUTBACK; \
		499	req_submit (req); \
		500	SPAGAIN; \
		501	\
		502	if (GIMME_V != G_VOID) \
		503	XPUSHs (req_sv (req, AIO_REQ_KLASS));
		504
375	static ssize_t	505	static int
376	pread (int fd, void *buf, size_t count, off_t offset)	506	extract_fd (SV *fh, int wr)
377	{	507	{
378	ssize_t res;	508	int fd = PerlIO_fileno (wr ? IoOFP (sv_2io (fh)) : IoIFP (sv_2io (fh)));
379	off_t ooffset;
380		509
381	pthread_mutex_lock (&iolock);	510	if (fd < 0)
382	ooffset = lseek (fd, 0, SEEK_CUR);	511	croak ("illegal fh argument, either not an OS file or read/write mode mismatch");
383	lseek (fd, offset, SEEK_SET);
384	res = read (fd, buf, count);
385	lseek (fd, ooffset, SEEK_SET);
386	pthread_mutex_unlock (&iolock);
387		512
388	return res;	513	return fd;
389	}	514	}
390		515
391	static ssize_t	516	MODULE = IO::AIO PACKAGE = IO::AIO
392	pwrite (int fd, void *buf, size_t count, off_t offset)
393	{
394	ssize_t res;
395	off_t ooffset;
396		517
397	pthread_mutex_lock (&iolock);	518	PROTOTYPES: ENABLE
398	ooffset = lseek (fd, 0, SEEK_CUR);
399	lseek (fd, offset, SEEK_SET);
400	res = write (fd, buf, count);
401	lseek (fd, offset, SEEK_SET);
402	pthread_mutex_unlock (&iolock);
403		519
404	return res;	520	BOOT:
405	}	521	{
		522	stash = gv_stashpv ("IO::AIO", 1);
		523
		524	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		525	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		526	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		527	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		528	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		529	#ifndef _WIN32
		530	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
406	#endif	531	#endif
		532	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		533	newCONSTSUB (stash, "SYNC_FILE_RANGE_WAIT_BEFORE", newSViv (EIO_SYNC_FILE_RANGE_WAIT_BEFORE));
		534	newCONSTSUB (stash, "SYNC_FILE_RANGE_WRITE" , newSViv (EIO_SYNC_FILE_RANGE_WRITE));
		535	newCONSTSUB (stash, "SYNC_FILE_RANGE_WAIT_AFTER" , newSViv (EIO_SYNC_FILE_RANGE_WAIT_AFTER));
407		536
408	#if !HAVE_FDATASYNC	537	create_respipe ();
409	# define fdatasync fsync
410	#endif
411		538
412	#if !HAVE_READAHEAD	539	if (eio_init (want_poll, done_poll) < 0)
413	# define readahead aio_readahead	540	croak ("IO::AIO: unable to initialise eio library");
414		541
415	static char readahead_buf[4096];	542	/* atfork child called in fifo order, so before eio's handler */
416		543	X_THREAD_ATFORK (0, 0, atfork_child);
417	static ssize_t
418	readahead (int fd, off_t offset, size_t count)
419	{
420	while (count > 0)
421	{
422	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
423
424	pread (fd, readahead_buf, len, offset);
425	offset += len;
426	count -= len;
427	}
428
429	errno = 0;
430	}	544	}
431	#endif
432		545
433	/* sendfile always needs emulation */
434	static ssize_t
435	sendfile_ (int ofd, int ifd, off_t offset, size_t count)
436	{
437	ssize_t res;
438
439	if (!count)
440	return 0;
441
442	#if __linux
443	res = sendfile (ofd, ifd, &offset, count);
444
445	#elif __freebsd
446	/*
447	* Of course, the freebsd sendfile is a dire hack with no thoughts
448	* wasted on making it similar to other i/o functions.
449	*/
450	{
451	off_t sbytes;
452	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
453
454	if (!res && errno == EAGAIN)
455	res = sbytes;
456	}
457
458	#elif __hpux
459	res = sendfile (ofd, ifd, offset, count, 0, 0);
460
461	#else
462	res = -1;
463	errno = ENOSYS;
464	#endif
465
466	if (res < 0 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK))
467	{
468	/* emulate sendfile. this is a major pain in the ass */
469	char *buf = malloc (4096);
470	res = 0;
471
472	for (;;)
473	{
474	ssize_t cnt;
475
476	cnt = pread (ifd, buf, 4096, offset);
477
478	if (cnt <= 0)
479	{
480	if (cnt && !res) res = -1;
481	break;
482	}
483
484	cnt = write (ofd, buf, cnt);
485
486	if (cnt <= 0)
487	{
488	if (cnt && !res) res = -1;
489	break;
490	}
491
492	offset += cnt;
493	res += cnt;
494	}
495
496	{
497	int errorno = errno;
498	free (buf);
499	errno = errorno;
500	}
501	}
502
503	return res;
504	}
505
506	/*****************************************************************************/
507
508	static void *
509	aio_proc (void *thr_arg)
510	{
511	aio_req req;
512	int type;
513
514	do
515	{
516	pthread_mutex_lock (&reqlock);
517
518	for (;;)
519	{
520	req = reqs;
521
522	if (reqs)
523	{
524	reqs = reqs->next;
525	if (!reqs) reqe = 0;
526	}
527
528	if (req)
529	break;
530
531	pthread_cond_wait (&reqwait, &reqlock);
532	}
533
534	pthread_mutex_unlock (&reqlock);
535
536	errno = 0; /* strictly unnecessary */
537
538	type = req->type;
539
540	switch (type)
541	{
542	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
543	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
544
545	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
546	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
547
548	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
549	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
550	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
551
552	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
553	case REQ_CLOSE: req->result = close (req->fd); break;
554	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
555	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
556	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
557
558	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
559	case REQ_FSYNC: req->result = fsync (req->fd); break;
560
561	case REQ_QUIT:
562	break;
563
564	default:
565	req->result = ENOSYS;
566	break;
567	}
568
569	req->errorno = errno;
570
571	pthread_mutex_lock (&reslock);
572
573	req->next = 0;
574
575	if (rese)
576	{
577	rese->next = req;
578	rese = req;
579	}
580	else
581	{
582	rese = ress = req;
583
584	/* write a dummy byte to the pipe so fh becomes ready */
585	write (respipe [1], &respipe, 1);
586	}
587
588	pthread_mutex_unlock (&reslock);
589	}
590	while (type != REQ_QUIT);
591
592	return 0;
593	}
594
595	#define dREQ \
596	aio_req req; \
597	\
598	if (SvOK (callback) && !SvROK (callback)) \
599	croak ("clalback must be undef or of reference type"); \
600	\
601	Newz (0, req, 1, aio_cb); \
602	if (!req) \
603	croak ("out of memory during aio_req allocation"); \
604	\
605	req->callback = newSVsv (callback);
606
607	MODULE = IO::AIO PACKAGE = IO::AIO
608
609	PROTOTYPES: ENABLE
610
611	BOOT:
612	{
613	create_pipe ();
614	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
615	}
616
617	void	546	void
618	min_parallel(nthreads)	547	max_poll_reqs (int nreqs)
619	int nthreads
620	PROTOTYPE: $	548	PROTOTYPE: $
		549	CODE:
		550	eio_set_max_poll_reqs (nreqs);
621		551
622	void	552	void
623	max_parallel(nthreads)	553	max_poll_time (double nseconds)
624	int nthreads
625	PROTOTYPE: $	554	PROTOTYPE: $
626
627	int
628	max_outstanding(nreqs)
629	int nreqs
630	PROTOTYPE: $
631	CODE:	555	CODE:
632	RETVAL = max_outstanding;	556	eio_set_max_poll_time (nseconds);
		557
		558	void
		559	min_parallel (int nthreads)
		560	PROTOTYPE: $
		561	CODE:
		562	eio_set_min_parallel (nthreads);
		563
		564	void
		565	max_parallel (int nthreads)
		566	PROTOTYPE: $
		567	CODE:
		568	eio_set_max_parallel (nthreads);
		569
		570	void
		571	max_idle (int nthreads)
		572	PROTOTYPE: $
		573	CODE:
		574	eio_set_max_idle (nthreads);
		575
		576	void
		577	max_outstanding (int maxreqs)
		578	PROTOTYPE: $
		579	CODE:
633	max_outstanding = nreqs;	580	max_outstanding = maxreqs;
634		581
635	void	582	void
636	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	583	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
637	SV * pathname
638	int flags
639	int mode
640	SV * callback
641	PROTOTYPE: $$$;$	584	PROTOTYPE: $$$;$
642	CODE:	585	PPCODE:
643	{	586	{
644	dREQ;	587	dREQ;
645		588
646	req->type = REQ_OPEN;	589	req->type = EIO_OPEN;
647	req->data = newSVsv (pathname);	590	req->sv1 = newSVsv (pathname);
648	req->dataptr = SvPVbyte_nolen (req->data);	591	req->ptr1 = SvPVbyte_nolen (req->sv1);
649	req->fd = flags;	592	req->int1 = flags;
650	req->mode = mode;	593	req->int2 = mode;
651		594
652	send_req (req);	595	REQ_SEND;
653	}	596	}
654		597
655	void	598	void
656	aio_close(fh,callback=&PL_sv_undef)	599	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
657	SV * fh
658	SV * callback
659	PROTOTYPE: $;$	600	PROTOTYPE: $;$
660	ALIAS:	601	ALIAS:
661	aio_close = REQ_CLOSE
662	aio_fsync = REQ_FSYNC	602	aio_fsync = EIO_FSYNC
663	aio_fdatasync = REQ_FDATASYNC	603	aio_fdatasync = EIO_FDATASYNC
664	CODE:	604	PPCODE:
665	{	605	{
		606	int fd = extract_fd (fh, 0);
666	dREQ;	607	dREQ;
667		608
668	req->type = ix;	609	req->type = ix;
669	req->fh = newSVsv (fh);	610	req->sv1 = newSVsv (fh);
670	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	611	req->int1 = fd;
671		612
672	send_req (req);	613	REQ_SEND (req);
673	}	614	}
674		615
675	void	616	void
		617	aio_sync_file_range (SV *fh, SV *offset, SV *nbytes, IV flags, SV *callback=&PL_sv_undef)
		618	PROTOTYPE: $$$$;$
		619	PPCODE:
		620	{
		621	int fd = extract_fd (fh, 0);
		622	dREQ;
		623
		624	req->type = EIO_SYNC_FILE_RANGE;
		625	req->sv1 = newSVsv (fh);
		626	req->int1 = fd;
		627	req->offs = SvVAL64 (offset);
		628	req->size = SvVAL64 (nbytes);
		629	req->int2 = flags;
		630
		631	REQ_SEND (req);
		632	}
		633
		634	void
		635	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		636	PROTOTYPE: $;$
		637	PPCODE:
		638	{
		639	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		640	int fd = extract_fd (fh, 0);
		641	dREQ;
		642
		643	if (close_pipe < 0)
		644	{
		645	int pipefd [2];
		646
		647	if (pipe (pipefd) < 0
		648	|| close (pipefd [1]) < 0
		649	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		650	abort (); /*D*/
		651
		652	close_pipe = pipefd [0];
		653	}
		654
		655	req->type = EIO_DUP2;
		656	req->int1 = close_pipe;
		657	req->sv2 = newSVsv (fh);
		658	req->int2 = fd;
		659
		660	REQ_SEND (req);
		661	}
		662
		663	void
676	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	664	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
677	SV * fh
678	UV offset
679	UV length
680	SV * data
681	UV dataoffset
682	SV * callback
683	ALIAS:	665	ALIAS:
684	aio_read = REQ_READ	666	aio_read = EIO_READ
685	aio_write = REQ_WRITE	667	aio_write = EIO_WRITE
686	PROTOTYPE: $$$$$;$	668	PROTOTYPE: $$$$$;$
687	CODE:	669	PPCODE:
688	{	670	{
689	aio_req req;
690	STRLEN svlen;	671	STRLEN svlen;
		672	int fd = extract_fd (fh, ix == EIO_WRITE);
691	char *svptr = SvPVbyte (data, svlen);	673	char *svptr = SvPVbyte (data, svlen);
		674	UV len = SvUV (length);
		675
		676	if (SvTYPE (data) > SVt_PVMG || SvROK (data))
		677	croak ("illegal data argument '%s', must be plain scalar string", SvPV_nolen (data));
692		678
693	SvUPGRADE (data, SVt_PV);	679	SvUPGRADE (data, SVt_PV);
694	SvPOK_on (data);	680	SvPOK_only (data);
695		681
696	if (dataoffset < 0)	682	if (dataoffset < 0)
697	dataoffset += svlen;	683	dataoffset += svlen;
698		684
699	if (dataoffset < 0 || dataoffset > svlen)	685	if (dataoffset < 0 || dataoffset > svlen)
700	croak ("data offset outside of string");	686	croak ("dataoffset outside of data scalar");
701		687
702	if (ix == REQ_WRITE)	688	if (ix == EIO_WRITE)
703	{	689	{
704	/* write: check length and adjust. */	690	/* write: check length and adjust. */
705	if (length < 0 || length + dataoffset > svlen)	691	if (!SvOK (length) || len + dataoffset > svlen)
706	length = svlen - dataoffset;	692	len = svlen - dataoffset;
707	}	693	}
708	else	694	else
709	{	695	{
710	/* read: grow scalar as necessary */	696	/* read: grow scalar as necessary */
711	svptr = SvGROW (data, length + dataoffset);	697	svptr = SvGROW (data, len + dataoffset + 1);
712	}	698	}
713		699
714	if (length < 0)	700	if (len < 0)
715	croak ("length must not be negative");	701	croak ("length must not be negative");
716		702
717	{	703	{
718	dREQ;	704	dREQ;
719		705
720	req->type = ix;	706	req->type = ix;
721	req->fh = newSVsv (fh);	707	req->sv1 = newSVsv (fh);
722	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	708	req->int1 = fd;
723	: IoOFP (sv_2io (fh)));	709	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
724	req->offset = offset;	710	req->size = len;
725	req->length = length;
726	req->data = SvREFCNT_inc (data);	711	req->sv2 = SvREFCNT_inc (data);
727	req->dataptr = (char *)svptr + dataoffset;	712	req->ptr2 = (char *)svptr + dataoffset;
		713	req->stroffset = dataoffset;
728		714
729	if (!SvREADONLY (data))	715	if (!SvREADONLY (data))
730	{	716	{
731	SvREADONLY_on (data);	717	SvREADONLY_on (data);
732	req->data2ptr = (void *)data;	718	req->flags |= FLAG_SV2_RO_OFF;
733	}	719	}
734		720
735	send_req (req);	721	REQ_SEND;
736	}	722	}
737	}	723	}
738		724
739	void	725	void
		726	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		727	PROTOTYPE: $$;$
		728	PPCODE:
		729	{
		730	SV *data;
		731	dREQ;
		732
		733	req->type = EIO_READLINK;
		734	req->sv1 = newSVsv (path);
		735	req->ptr1 = SvPVbyte_nolen (req->sv1);
		736
		737	REQ_SEND;
		738	}
		739
		740	void
740	aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	741	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
741	SV * out_fh
742	SV * in_fh
743	UV in_offset
744	UV length
745	SV * callback
746	PROTOTYPE: $$$$;$	742	PROTOTYPE: $$$$;$
747	CODE:	743	PPCODE:
748	{	744	{
		745	int ifd = extract_fd (in_fh , 0);
		746	int ofd = extract_fd (out_fh, 0);
749	dREQ;	747	dREQ;
750		748
751	req->type = REQ_SENDFILE;	749	req->type = EIO_SENDFILE;
752	req->fh = newSVsv (out_fh);	750	req->sv1 = newSVsv (out_fh);
753	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	751	req->int1 = ofd;
754	req->fh2 = newSVsv (in_fh);	752	req->sv2 = newSVsv (in_fh);
755	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	753	req->int2 = ifd;
756	req->offset = in_offset;	754	req->offs = SvVAL64 (in_offset);
757	req->length = length;	755	req->size = length;
758		756
759	send_req (req);	757	REQ_SEND;
760	}	758	}
761		759
762	void	760	void
763	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	761	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
764	SV * fh
765	UV offset
766	IV length
767	SV * callback
768	PROTOTYPE: $$$;$	762	PROTOTYPE: $$$;$
769	CODE:	763	PPCODE:
770	{	764	{
		765	int fd = extract_fd (fh, 0);
771	dREQ;	766	dREQ;
772		767
773	req->type = REQ_READAHEAD;	768	req->type = EIO_READAHEAD;
774	req->fh = newSVsv (fh);	769	req->sv1 = newSVsv (fh);
775	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	770	req->int1 = fd;
776	req->offset = offset;	771	req->offs = SvVAL64 (offset);
777	req->length = length;	772	req->size = length;
778		773
779	send_req (req);	774	REQ_SEND;
780	}	775	}
781		776
782	void	777	void
783	aio_stat(fh_or_path,callback=&PL_sv_undef)	778	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
784	SV * fh_or_path
785	SV * callback
786	ALIAS:	779	ALIAS:
787	aio_stat = REQ_STAT	780	aio_stat = EIO_STAT
788	aio_lstat = REQ_LSTAT	781	aio_lstat = EIO_LSTAT
789	CODE:	782	PPCODE:
790	{	783	{
791	dREQ;	784	dREQ;
792		785
793	New (0, req->statdata, 1, Stat_t);	786	req->sv1 = newSVsv (fh_or_path);
794	if (!req->statdata)
795	{
796	free_req (req);
797	croak ("out of memory during aio_req->statdata allocation");
798	}
799		787
800	if (SvPOK (fh_or_path))	788	if (SvPOK (req->sv1))
801	{	789	{
802	req->type = ix;	790	req->type = ix;
803	req->data = newSVsv (fh_or_path);
804	req->dataptr = SvPVbyte_nolen (req->data);	791	req->ptr1 = SvPVbyte_nolen (req->sv1);
805	}	792	}
806	else	793	else
807	{	794	{
808	req->type = REQ_FSTAT;	795	req->type = EIO_FSTAT;
809	req->fh = newSVsv (fh_or_path);
810	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	796	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		797	}
		798
		799	REQ_SEND;
		800	}
		801
		802	void
		803	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		804	PPCODE:
		805	{
		806	dREQ;
		807
		808	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		809	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		810	req->sv1 = newSVsv (fh_or_path);
		811
		812	if (SvPOK (req->sv1))
811	}	813	{
		814	req->type = EIO_UTIME;
		815	req->ptr1 = SvPVbyte_nolen (req->sv1);
		816	}
		817	else
		818	{
		819	req->type = EIO_FUTIME;
		820	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		821	}
812		822
813	send_req (req);	823	REQ_SEND;
814	}	824	}
815		825
816	void	826	void
		827	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		828	PPCODE:
		829	{
		830	dREQ;
		831
		832	req->sv1 = newSVsv (fh_or_path);
		833	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		834
		835	if (SvPOK (req->sv1))
		836	{
		837	req->type = EIO_TRUNCATE;
		838	req->ptr1 = SvPVbyte_nolen (req->sv1);
		839	}
		840	else
		841	{
		842	req->type = EIO_FTRUNCATE;
		843	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		844	}
		845
		846	REQ_SEND;
		847	}
		848
		849	void
		850	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		851	ALIAS:
		852	aio_chmod = EIO_CHMOD
		853	aio_mkdir = EIO_MKDIR
		854	PPCODE:
		855	{
		856	dREQ;
		857
		858	req->int2 = mode;
		859	req->sv1 = newSVsv (fh_or_path);
		860
		861	if (SvPOK (req->sv1))
		862	{
		863	req->type = ix;
		864	req->ptr1 = SvPVbyte_nolen (req->sv1);
		865	}
		866	else
		867	{
		868	req->type = EIO_FCHMOD;
		869	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		870	}
		871
		872	REQ_SEND;
		873	}
		874
		875	void
		876	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		877	PPCODE:
		878	{
		879	dREQ;
		880
		881	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		882	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		883	req->sv1 = newSVsv (fh_or_path);
		884
		885	if (SvPOK (req->sv1))
		886	{
		887	req->type = EIO_CHOWN;
		888	req->ptr1 = SvPVbyte_nolen (req->sv1);
		889	}
		890	else
		891	{
		892	req->type = EIO_FCHOWN;
		893	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		894	}
		895
		896	REQ_SEND;
		897	}
		898
		899	void
817	aio_unlink(pathname,callback=&PL_sv_undef)	900	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
818	SV * pathname
819	SV * callback
820	ALIAS:	901	ALIAS:
821	aio_unlink = REQ_UNLINK	902	aio_unlink = EIO_UNLINK
822	aio_rmdir = REQ_RMDIR	903	aio_rmdir = EIO_RMDIR
		904	aio_readdir = EIO_READDIR
823	CODE:	905	PPCODE:
824	{	906	{
825	dREQ;	907	dREQ;
826		908
827	req->type = ix;	909	req->type = ix;
828	req->data = newSVsv (pathname);	910	req->sv1 = newSVsv (pathname);
829	req->dataptr = SvPVbyte_nolen (req->data);	911	req->ptr1 = SvPVbyte_nolen (req->sv1);
		912
		913	REQ_SEND;
		914	}
		915
		916	void
		917	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		918	ALIAS:
		919	aio_link = EIO_LINK
		920	aio_symlink = EIO_SYMLINK
		921	aio_rename = EIO_RENAME
		922	PPCODE:
		923	{
		924	dREQ;
830		925
831	send_req (req);	926	req->type = ix;
832	}	927	req->sv1 = newSVsv (oldpath);
833		928	req->ptr1 = SvPVbyte_nolen (req->sv1);
834	void	929	req->sv2 = newSVsv (newpath);
835	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	930	req->ptr2 = SvPVbyte_nolen (req->sv2);
836	SV * oldpath
837	SV * newpath
838	SV * callback
839	CODE:
840	{
841	dREQ;
842		931
843	req->type = REQ_SYMLINK;	932	REQ_SEND;
844	req->fh = newSVsv (oldpath);	933	}
845	req->data2ptr = SvPVbyte_nolen (req->fh);	934
846	req->data = newSVsv (newpath);	935	void
847	req->dataptr = SvPVbyte_nolen (req->data);	936	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		937	PPCODE:
		938	{
		939	dREQ;
848		940
849	send_req (req);	941	req->type = EIO_MKNOD;
		942	req->sv1 = newSVsv (pathname);
		943	req->ptr1 = SvPVbyte_nolen (req->sv1);
		944	req->int2 = (mode_t)mode;
		945	req->offs = dev;
		946
		947	REQ_SEND;
850	}	948	}
851		949
852	void	950	void
		951	aio_busy (double delay, SV *callback=&PL_sv_undef)
		952	PPCODE:
		953	{
		954	dREQ;
		955
		956	req->type = EIO_BUSY;
		957	req->nv1 = delay < 0. ? 0. : delay;
		958
		959	REQ_SEND;
		960	}
		961
		962	void
		963	aio_group (SV *callback=&PL_sv_undef)
		964	PROTOTYPE: ;$
		965	PPCODE:
		966	{
		967	dREQ;
		968
		969	req->type = EIO_GROUP;
		970
		971	req_submit (req);
		972	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		973	}
		974
		975	void
		976	aio_nop (SV *callback=&PL_sv_undef)
		977	ALIAS:
		978	aio_nop = EIO_NOP
		979	aio_sync = EIO_SYNC
		980	PPCODE:
		981	{
		982	dREQ;
		983
		984	req->type = ix;
		985
		986	REQ_SEND;
		987	}
		988
		989	int
		990	aioreq_pri (int pri = 0)
		991	PROTOTYPE: ;$
		992	CODE:
		993	RETVAL = next_pri;
		994	if (items > 0)
		995	{
		996	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		997	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		998	next_pri = pri;
		999	}
		1000	OUTPUT:
		1001	RETVAL
		1002
		1003	void
		1004	aioreq_nice (int nice = 0)
		1005	CODE:
		1006	nice = next_pri - nice;
		1007	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1008	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1009	next_pri = nice;
		1010
		1011	void
853	flush()	1012	flush ()
854	PROTOTYPE:	1013	PROTOTYPE:
855	CODE:	1014	CODE:
856	while (nreqs)	1015	while (eio_nreqs ())
857	{	1016	{
858	poll_wait ();	1017	poll_wait ();
859	poll_cb ();	1018	poll_cb ();
860	}	1019	}
861		1020
862	void	1021	int
863	poll()	1022	poll()
864	PROTOTYPE:	1023	PROTOTYPE:
865	CODE:	1024	CODE:
866	if (nreqs)
867	{
868	poll_wait ();	1025	poll_wait ();
869	poll_cb ();	1026	RETVAL = poll_cb ();
870	}	1027	OUTPUT:
		1028	RETVAL
871		1029
872	int	1030	int
873	poll_fileno()	1031	poll_fileno()
874	PROTOTYPE:	1032	PROTOTYPE:
875	CODE:	1033	CODE:
…		…
887		1045
888	void	1046	void
889	poll_wait()	1047	poll_wait()
890	PROTOTYPE:	1048	PROTOTYPE:
891	CODE:	1049	CODE:
892	if (nreqs)
893	poll_wait ();	1050	poll_wait ();
894		1051
895	int	1052	int
896	nreqs()	1053	nreqs()
897	PROTOTYPE:	1054	PROTOTYPE:
898	CODE:	1055	CODE:
899	RETVAL = nreqs;	1056	RETVAL = eio_nreqs ();
900	OUTPUT:	1057	OUTPUT:
901	RETVAL	1058	RETVAL
902		1059
		1060	int
		1061	nready()
		1062	PROTOTYPE:
		1063	CODE:
		1064	RETVAL = eio_nready ();
		1065	OUTPUT:
		1066	RETVAL
		1067
		1068	int
		1069	npending()
		1070	PROTOTYPE:
		1071	CODE:
		1072	RETVAL = eio_npending ();
		1073	OUTPUT:
		1074	RETVAL
		1075
		1076	int
		1077	nthreads()
		1078	PROTOTYPE:
		1079	CODE:
		1080	RETVAL = eio_nthreads ();
		1081	OUTPUT:
		1082	RETVAL
		1083
		1084	void _on_next_submit (SV *cb)
		1085	CODE:
		1086	SvREFCNT_dec (on_next_submit);
		1087	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1088
		1089	PROTOTYPES: DISABLE
		1090
		1091	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1092
		1093	void
		1094	cancel (aio_req_ornot req)
		1095	CODE:
		1096	eio_cancel (req);
		1097
		1098	void
		1099	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1100	PPCODE:
		1101	{
		1102	if (GIMME_V != G_VOID)
		1103	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1104
		1105	if (items > 1)
		1106	{
		1107	SV *cb_cv = get_cb (callback);
		1108
		1109	SvREFCNT_dec (req->callback);
		1110	req->callback = SvREFCNT_inc (cb_cv);
		1111	}
		1112	}
		1113
		1114	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1115
		1116	void
		1117	add (aio_req grp, ...)
		1118	PPCODE:
		1119	{
		1120	int i;
		1121
		1122	if (grp->int1 == 2)
		1123	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1124
		1125	for (i = 1; i < items; ++i )
		1126	{
		1127	aio_req req;
		1128
		1129	if (GIMME_V != G_VOID)
		1130	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1131
		1132	req = SvAIO_REQ (ST (i));
		1133
		1134	if (req)
		1135	eio_grp_add (grp, req);
		1136	}
		1137	}
		1138
		1139	void
		1140	cancel_subs (aio_req_ornot req)
		1141	CODE:
		1142	req_cancel_subs (req);
		1143
		1144	void
		1145	result (aio_req grp, ...)
		1146	CODE:
		1147	{
		1148	int i;
		1149	AV *av;
		1150
		1151	grp->errorno = errno;
		1152
		1153	av = newAV ();
		1154
		1155	for (i = 1; i < items; ++i )
		1156	av_push (av, newSVsv (ST (i)));
		1157
		1158	SvREFCNT_dec (grp->sv1);
		1159	grp->sv1 = (SV *)av;
		1160	}
		1161
		1162	void
		1163	errno (aio_req grp, int errorno = errno)
		1164	CODE:
		1165	grp->errorno = errorno;
		1166
		1167	void
		1168	limit (aio_req grp, int limit)
		1169	CODE:
		1170	eio_grp_limit (grp, limit);
		1171
		1172	void
		1173	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1174	CODE:
		1175	{
		1176	SvREFCNT_dec (grp->sv2);
		1177	grp->sv2 = newSVsv (callback);
		1178	grp->feed = aio_grp_feed;
		1179
		1180	if (grp->int2 <= 0)
		1181	grp->int2 = 2;
		1182
		1183	eio_grp_limit (grp, grp->int2);
		1184	}
		1185

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